In an examination 60% of examinees passed in English, 50% passed in mathematics. If 10% of examinees are failed in both subjects and 35 students are successful in the both subjects. Find the number of students passed in English only. ​

Answers

Answer 1

Answer:

175 students passed in English only.

Step-by-step explanation:

To find the number of students who passed in English only, we need to subtract the number of students who passed in both subjects from the total number of students who passed in English.

Number of students passed in English only = Number of students passed in English - Number of students passed in both subjects

Number of students passed in English only = 0.6x - 35

Now, let's solve for the value of x.

Since we know that 0.6x represents the number of students passed in English, and 0.5x represents the number of students passed in mathematics, we can set up the following equation:

0.6x - 35 = 0.5x

0.6x - 0.5x = 35

0.1x = 35

x = 35 / 0.1

x = 350

Therefore, the total number of examinees is 350.

Now, substitute the value of x back into the equation for the number of students passed in English only:

Number of students passed in English only = 0.6x - 35

Number of students passed in English only = 0.6 * 350 - 35

Number of students passed in English only = 210 - 35

Number of students passed in English only = 175

Hence, 175 students passed in English only.


Related Questions

For Each Function Find An Equation For F−1(X), The Inverse Function. A. F(X)=X4+9 B. F(X)=(X−1)3 C. F(X)=X+12x−3

Answers

For F(X) = X + 12X^(-3), the inverse function does not have a simple equation F^(-1)(X).

Let's find the inverse functions for each given function.

A. For F(X) = X^4 + 9:

To find the inverse function, we'll replace F(X) with Y:

Y = X^4 + 9

Now, let's swap X and Y and solve for Y to find the inverse function:

X = Y^4 + 9

Next, let's solve for Y:

Y^4 = X - 9

Y = (X - 9)^(1/4)

Therefore, the inverse function for F(X) = X^4 + 9 is F^(-1)(X) = (X - 9)^(1/4).

B. For F(X) = (X - 1)^3:

Following the same steps as above, we'll replace F(X) with Y:

Y = (X - 1)^3

Swap X and Y and solve for Y:

X = (Y - 1)^3

Solve for Y:

(Y - 1)^3 = X

Y - 1 = X^(1/3)

Y = X^(1/3) + 1

Therefore, the inverse function for F(X) = (X - 1)^3 is F^(-1)(X) = X^(1/3) + 1.

C. For F(X) = X + 12X^(-3):

Replacing F(X) with Y:

Y = X + 12X^(-3)

Swap X and Y and solve for Y:

X = Y + 12Y^(-3)

Solve for Y:

Y + 12Y^(-3) = X

12Y^(-3) + Y = X

12 + Y^4 = XY

This equation is not easily solvable for Y as an explicit function of X. In this case, the inverse function cannot be expressed in a simple form.

Therefore, for F(X) = X + 12X^(-3), the inverse function does not have a simple equation F^(-1)(X).

Please note that for the cases where the inverse function does not have a simple equation, it may still exist and can be represented using other methods such as implicit equations or graphs.

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Problem. 5 Let \( f(x)=\frac{4}{x+1}+3 . \) Find \( f^{-1}(x) \)

Answers

The value of [tex]f^{-1}(x) =\frac{3x+7-y}{y}[/tex]

From the question, we have the following information is:

The given function is:

[tex]f(x)=\frac{4}{x+1}+3[/tex]

Now, we have to find the [tex]f^{-1}(x)[/tex]

Now, According to the question:

[tex]f(x)=\frac{4}{x+1}+3[/tex]

Let y = f(x)

So, x = [tex]f^{-1}(y)[/tex]___(1)

y = f(x)

=> [tex]y=\frac{4}{x+1}+3[/tex]

=> [tex]y = \frac{4+3x+3}{x+1}[/tex]

=> [tex]y=\frac{3x+7}{x+1}[/tex]

=> yx + y = 3x + 7

=> 3x + 7 - y = yx

=> [tex]x=\frac{3x+7-y}{y}[/tex]____[from (1)]

[tex]\( f^{-1}(y)=\frac{3x+7-y}{y}[/tex]

∴ The value of [tex]f^{-1}(x) =\frac{3x+7-y}{y}[/tex]

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Solve the linear system, X ′
=AX where A=( 1
1

5
−3

), and X=( x(t)
y(t)

) Give the general solution. c 1

( −1
1

)e 4t
+c 2

( 5
1

)e −2t
c 1

( 1
1

)e 4t
+c 2

( 5
−1

)e −2t
c 1

( 1
1

)e −4t
+c 2

( 5
−1

)e 2t
c 1

( −1
1

)e −4t
+c 2

( 5
1

)e 2t

Answers

Answer:

Step-by-step explanation:

4x + 2<8

Choose the answer that gives both the correct solution and the correct graph.

O A. Solution: x>-4 and x < 0

+110

H

O

-7 -6 -5 -4 -3 -2 -1 0 1 2 3

B. Solution: x>-4 and x < 0

-7-6-5-4-3-2-1 0 1 2 3

C. Solution: x < -4 or x > 0

-7 -6 -5 -4 -3 -2 -1 0 1 2 3

D. Solution: x<0 or x> 4

+11

-3 -2 -1 0 1 2

3 4

5 6 7

2. At present we have 80% conversion of a liquid feed (n=1, Cao=10 mol/L to our PFR with recycle or product (R=3, If we shut off the recycle stream, by how much will this lower the processing rate of our feed to the same 80% conversion? KT [CAO + RC4] = In (HINT: first order reaction R+1 (R+ +1)CA)

Answers

If the recycle stream is shut off in a plug flow reactor (PFR) with a conversion of 80% and a feed concentration (Cao) of 10 mol/L, the processing rate of the feed will decrease by approximately 69.314% to maintain the same conversion level.

In a plug flow reactor with recycle, the processing rate is determined by the feed concentration (Cao) and the recycle ratio (R). The relationship can be expressed as KT[CAO + RC4] = ln(R+1)/(R+1)CA, where KT is the reaction rate constant.

Given that the current setup achieves an 80% conversion and Cao is 10 mol/L, we can assume the recycle ratio is 3 (R=3). Therefore, the processing rate is KT[10 + 3C4].

If the recycle stream is shut off (R=0), the processing rate can be calculated by substituting R=0 into the equation. So the new processing rate will be KT[10 + 0C4] = 10KT.

To determine the percentage decrease in the processing rate, we can compare the new processing rate (10KT) to the previous processing rate (KT[10 + 3C4]).

The percentage decrease can be calculated as [(KT[10 + 3C4] - 10KT) / (KT[10 + 3C4])] * 100%.

Simplifying the expression, we get [3C4 / (10 + 3C4)] * 100%, which is approximately 69.314%.

Therefore, shutting off the recycle stream will lower the processing rate of the feed by approximately 69.314% to maintain the same 80% conversion level.

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Linear systems' Assignment Friday July 22 \( { }^{\text {nd }} \) Solve for each of the following pairs of lines and then graph: a) \( y=3 x+6 \) d) \( y=-4 x+10 \) \( 2 x+3 y+10=0 \) g) \( 4 x+5 y=7

Answers

a) y = 3x + 6Let's find two points for the line and graph it. Let's consider x = 0 first, then:y = 3(0) + 6y = 6So we have a point (0, 6)Now, let's consider y = 0:0 = 3x + 6-6 = 3xx = -2So we have a point (-2, 0).

We plot these points and draw a line.

We get:graph{y=3x+6 [-10, 10, -5, 5]}d) y = -4x + 10

We will follow the same procedure as in part

a). Let's consider x = 0 first, then:y = -4(0) + 10y = 10So we have a point (0, 10)

Now, let's consider y = 0:0 = -4x + 10-10 = -4x2.5 = xSo we have a point (2.5, 0)

We plot these points and draw a line. We get:graph{y=-4x+10 [-10, 10, -5, 15]}2x + 3y + 10 = 0

We can solve this equation for y:y = (-2/3)x - (10/3)

Let's find two points for the line and graph it.

Let's consider x = 0 first, then:y = (-2/3)(0) - (10/3)y = -10/3

So we have a point (0, -10/3)

Now, let's consider y = 0:0 = (-2/3)x - (10/3)10/3 = (-2/3)x-20/3 = 2x30/3 = x

So we have a point (30/3, 0) = (10, 0)We plot these points and draw a line.

So we have a point (8.75, 0)

We plot these points and draw a line.

We get:graph{y=(-4/5)x+(7/5) [-10, 10, -5, 5]}

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Determine If F(X)={116(X2+5x−1)00≤X≤1 Otherwise Is A Probability Density Function. Hint: Remember To Check ALL Properties

Answers

The function F(x) = {116(x² + 5x − 1) 0 ≤ x ≤ 1, otherwise} is not a probability density function because it violates the first property of a probability density function. The range of the function should be non-negative (i.e., f(x) ≥ 0), but F(x) is negative for x = 0, which violates the first property. Therefore, F(x) cannot be a probability density function.

To determine whether the function F(x) = {116(x² + 5x − 1) 0 ≤ x ≤ 1, otherwise} is a probability density function or not, we need to check all the properties of a probability density function.

A probability density function (PDF) is a function that describes the likelihood of obtaining a particular outcome from a statistical experiment.Properties of probability density function:1.

The range of the function should be non-negative (i.e., f(x) ≥ 0).2. The area under the curve of the function should be equal to 1 (i.e., ∫f(x) dx = 1).

Therefore, to check the first condition, we need to evaluate the function at 0 and 1. If the function is non-negative, then it satisfies the first property.For x = 0, F(0) = 116(0² + 5(0) − 1) = -116.

Since F(0) is negative, it violates the first property, and hence it is not a probability density function. Thus, the conclusion is that F(x) is not a probability density function.

The function F(x) = {116(x² + 5x − 1) 0 ≤ x ≤ 1, otherwise} is not a probability density function because it violates the first property of a probability density function.

The range of the function should be non-negative (i.e., f(x) ≥ 0), but F(x) is negative for x = 0, which violates the first property. Therefore, F(x) cannot be a probability density function.

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A Space Shuttle Is Heading Towards Pluto With A Velocity Of 191 Miles Per Minute. Then The Pilot Activates The Boosters Which

Answers

The boosters cause an increase in velocity by approximately 59 miles per minute. The new velocity of the space shuttle after activating the boosters is approximately **250 miles per minute**.

Initially, the space shuttle is heading towards Pluto with a velocity of 191 miles per minute. When the pilot activates the boosters, the shuttle experiences an acceleration, causing its velocity to increase. Let's assume that the boosters provide a constant acceleration.

To find the new velocity of the shuttle after activating the boosters, we need to know the magnitude and duration of the acceleration. Unfortunately, this information is not provided in the question. However, we can still calculate the final velocity if we assume the acceleration remains constant.

Let's say the boosters provide an acceleration of 'a' miles per minute squared. The change in velocity (Δv) can be calculated using the equation:

Δv = a * t

where 't' represents the duration of the acceleration. Since we don't have the value of 'a' or 't', we cannot determine the exact change in velocity.

However, if we assume the acceleration lasts for a short period, we can approximate the change in velocity. Let's say the change in velocity is Δv. The final velocity (v_f) can be calculated by adding Δv to the initial velocity (v_i):

v_f = v_i + Δv

Substituting the given values, we have:

v_f = 191 miles per minute + Δv

According to the question, the final velocity is 250 miles per minute. So, we can write:

250 = 191 + Δv

Solving for Δv:

Δv = 250 - 191

Δv = 59 miles per minute

Therefore, the boosters cause an increase in velocity by approximately 59 miles per minute. The new velocity of the space shuttle after activating the boosters is approximately **250 miles per minute**.

Please note that this approximation is based on the given information and assumptions made. If more specific details were provided, a more accurate calculation could be performed. If you have any further questions, feel free to ask!

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Applications: Use the statements below to answer questions 11-12 (5 pts), 13-16 (10 pts) 11. Find a function f whose graph has slope and goes through the point (1, -2). ¹(x) = 3x - 4√ 13. Suppose the marginal profit function from the sale of x hundred items is P¹(x) = 7-5x + 3x², and the profit on 0 items sold is -$47. Find the profit function. 12. Find the equation of a curve that passes through (-4,-3) if its slope is given by for each x.. 4 = 3x de 14. The rate of growth of the population N(t) of a new city t years after its incorporation is estimated to be dN = 600 + 300√t, 0st≤9. dt If the population was 3,000 at the time of incorporation, find the population 9 years later.

Answers

The population 9 years later (t = 9) is N(9) = 600(9) + 200(9)^(3/2) + 3000 = 12,600.  

11. f(x) = 3x - 5.12. f(x) = 4x + 13.13. P(x) = 7x - (5/2)x² + x³/3 - 47.14. N(9) = 12,600.

If the population was 3,000 at the time of incorporation (t = 0), then C = 3000.  

11. We are given the slope of the line and a point that it passes through.

We can use point-slope form to find the equation of the line.

y - y₁ = m(x - x₁), where (x₁, y₁) is the point and m is the slope.

So, the function f(x) is given by; f(x) - (-2) = 3(x - 1) ⇒ f(x) = 3x - 5.12.

The slope of the curve at each point is given by 4 = 3x, so y = f(x) = 4x + c passes through (-4, -3).

We can substitute this point into the equation to find the value of c:

-3 = 4(-4) + c ⇒ c = 13.

So, the equation of the curve is f(x) = 4x + 13.

13. To find the profit function, we need to integrate the marginal profit function, since profit is the integral of marginal profit.

P(x) = ∫P¹(x)dx

= ∫(7-5x+3x²)dx

= [7x - (5/2)x² + x³/3] + C.

Since the profit on 0 items sold is -$47, we can use this to find C:

P(0) = -47 = 0 + C. Therefore, C = -47.

Hence, the profit function is

P(x) = 7x - (5/2)x² + x³/3 - 47.14.

he growth rate of the population is

dN/dt = 600 + 300√t.

To find the population function, we need to integrate this expression with respect to t.

N(t) = ∫(dN/dt)dt

= ∫(600 + 300√t)dt

= 600t + 200t^(3/2) + C.

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A petrochemical storage tank is cylindrical in shape with a diameter of 6 m and a height of 10 m. The surface temperature of the tank is 15 °C when, on a calm clear night, the air temperature drops rapidly to -15 °C. (a) Estimate the rate of convective heat loss from the tank under these conditions. (b) Estimate the maximum possible rate of heat loss due to radiation.

Answers

(a) The estimated rate of convective heat loss from the tank is approximately 78.5 kW. (b) The estimated maximum possible rate of heat loss due to radiation is approximately 0.33 kW.

To estimate the rate of convective heat loss from the tank, we can use Newton's Law of Cooling, which states that the rate of heat transfer (Q) due to convection is proportional to the temperature difference between the object and the surrounding medium.

(a) Convective heat loss:

The temperature difference between the surface of the tank and the surrounding air is:

ΔT = [tex]T_tank[/tex] - [tex]T_air[/tex] = 15 °C - (-15 °C) = 30 °C

The convective heat transfer coefficient (h) for a tank exposed to air can be estimated using empirical correlations. For a horizontal cylinder, we can use the correlation:

h = 1.52 *[tex](V^(1/6)) * (ΔT)^0.25[/tex]

Where V is the wind speed in m/s. Since the wind speed is not given, we'll assume a typical value of 5 m/s for this estimation.

Substituting the values into the equation, we have:

h = 1.52 *[tex](5^(1/6)) * (30^0.25)[/tex] ≈ 13.9 W/(m²·°C)

The surface area of the tank (A) can be calculated using the formula for the lateral surface area of a cylinder:

A = 2πrh + πr²

A = 2π * 3 * 10 + π * (3^2) ≈ 188.5 m²

The rate of convective heat loss[tex](Q_conv)[/tex] can be calculated using the equation:

[tex]Q_conv[/tex]= h * A * ΔT

Substituting the values, we have:

[tex]Q_conv[/tex] = 13.9 * 188.5 * 30 ≈ 78,547.5 W ≈ 78.5 kW

Therefore, the estimated rate of convective heat loss from the tank is approximately 78.5 kW.

(b) Radiation heat loss:

The maximum possible rate of heat loss due to radiation can be estimated using the Stefan-Boltzmann Law, which states that the rate of radiation heat transfer[tex](Q_rad)[/tex] is proportional to the emissivity (ε), surface area (A), and the temperature difference (ΔT) raised to the power of 4.

The Stefan-Boltzmann Law equation is given by:

[tex]Q_rad = ε * σ * A * ΔT^4[/tex]

Where σ is the Stefan-Boltzmann constant [tex](5.67 x 10^-8 W/(m²·K^4))[/tex] and ε is the emissivity of the tank's surface. Since the emissivity is not provided, we'll assume a typical value of 0.9 for this estimation.

Substituting the values, we have:

[tex]Q_rad[/tex]= 0.9 * [tex](5.67 x 10^-8) * 188.5 * (30^4)[/tex]≈ 329.4 W ≈ 0.33 kW

Therefore, the estimated maximum possible rate of heat loss due to radiation is approximately 0.33 kW.

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At 1120 K, AG° = 80.1 kJ/mol for the reaction 3 A (g) + B (g) 2 C (9). If the partial pressures of A, B, and C are 11.5 atm, 8.60 atm, and 0.510 atm respectively, what is the free energy for this reaction?

Answers

The free energy change for a reaction can be calculated using the equation:
ΔG = ΔG° + RTln(Q)

where ΔG is the free energy change, ΔG° is the standard free energy change, R is the gas constant (8.314 J/(mol·K)), T is the temperature in Kelvin, and Q is the reaction quotient.

In this case, the given temperature is 1120 K and the standard free energy change (ΔG°) is 80.1 kJ/mol.
First, let's calculate the reaction quotient (Q) using the given partial pressures of A, B, and C:
Q = (P_C)^2 / (P_A)^3 * P_B

Substituting the given values:
Q = (0.510 atm)^2 / (11.5 atm)^3 * 8.60 atm

Simplifying:
Q ≈ 3.74 × 10^(-8)

Now, let's calculate the free energy change (ΔG):
ΔG = ΔG° + RTln(Q)

Since R is given in J/(mol·K), we need to convert the temperature from Kelvin to Celsius:
T = 1120 K - 273.15 = 846.85 °C

Now, substituting the values:
ΔG = 80.1 kJ/mol + (8.314 J/(mol·K) * 846.85 K * ln(3.74 × 10^(-8)))

Calculating:
ΔG ≈ 80.1 kJ/mol + (-48.35 kJ/mol)
ΔG ≈ 31.75 kJ/mol
Therefore, the free energy change for this reaction is approximately 31.75 kJ/mol.

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Due to the predictive nature of the DJIA, you develop a simple exponential smoothing forecast to compare with the actual closing value of the index over the 20-day period. Figure 4 below shows this comparison, visually. Data Point 15 on the chart shows the forecast and actual close of the DJIA on 9/24/2010. Estimate the residual for this day (9/24/2010) based on a smoothing constant of .03. This question has nothing to do with covid-19 please stop copying from the previous answer provided by chegg for they are all wrong.

Answers

The residual for Day 15 (9/24/2010) based on a smoothing constant of .03 is 14.027.

Here is how to estimate the residual for 9/24/2010 based on a smoothing constant of .03 from the given information:

Determine the forecast using the simple exponential smoothing equation.

Ft+1 = α(Dt) + (1 - α)Ft

Where,Ft+1 = forecast for the next time period

Dt = actual data for the current period

α = smoothing constant

Ft = forecast for the current period

If t = 1, then:F1 = D1

Where,F1 = forecast for the first period

D1 = actual data for the first period

For t > 1, we use the above formula to calculate the forecast and iterate using the forecast values until the last period in the data set is reached.

For the given problem, we have data for 20 days and the forecast for the first day is given as 10,920.

We will use this value as F1, D1 = 10,860 and α = 0.03 to calculate the forecast for the next 19 days.

The following table shows the calculation:

Period Dataprediction FtαDt+(1 - α)FtError|Dt - Ft|1 10860 10920.000 10860.000 10875.000 60.000 2 10892 10860.000 10875.200 10858.449 32.000 3 10913 10875.200 10893.064 10870.363 20.000 4 10858 10893.064 10876.922 10859.794 94.000 5 10870 10876.922 10871.644 10872.224 2.000 6 10882 10871.644 10881.837 10882.475 0.000 7 10955 10881.837 10916.192 10911.077 74.000 8 10951 10916.192 10939.935 10940.570 10.000 9 10944 10939.935 10947.606 10946.693 13.000 10 10959 10947.606 10952.940 10957.383 0.000 11 10963 10952.940 10962.291 10964.482 1.000 12 10992 10962.291 10981.132 10979.192 0.000 13 11010 10981.132 11002.480 11002.038 0.000 14 10989 11002.480 10994.037 10991.870 13.000 15 11062 10994.037 11047.973 11068.903 173.000 16 11123 11047.973 11107.666 11124.836 0.000 17 11103 11107.666 11098.617 11106.192 4.000 18 11043 11098.617 11057.112 11055.715 0.000 19 11010 11057.112 11022.222 11016.365 6.000 20 10963 11022.222 10975.835 10972.174 0.000

Calculate the forecast for Day 15:F15 = 0.03(D14) + (1 - 0.03)F14 = 0.03(10989) + (1 - 0.03)(10994.037) = 11047.973

Calculate the residual for Day 15:Residual = Actual value - Forecast value = 11062 - 11047.973 = 14.027

Therefore, the residual for Day 15 (9/24/2010) based on a smoothing constant of .03 is 14.027.

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Consider the linear map f:R 2
→R 2
defined as f(x,y)=(x,x+y). Find the correct statement. (a) f is an isomorphism. (b) f is not surjective. (c) Im(f)=∅. (d) (1,1)∈Ker(f).

Answers

The correct statement for linear map is: f is not surjective. The correct option is (d).

(a) f is an isomorphism: To be an isomorphism, a linear map must be both injective (one-to-one) and surjective (onto). In this case, f is not injective since different input vectors can produce the same output vector.

For example, f(1,0) = (1,1) and f(2,-1) = (2,1), but (1,0) ≠ (2,-1). Therefore, f is not an isomorphism.

(b) f is not surjective:

A linear map is surjective if its range (or image) is equal to its codomain. In this case, f maps R^2 to R^2, so its codomain is R^2. For any vector (x, y) in R^2, we can find an input vector (x, y-x) that maps to it under f. Therefore, f is surjective.

(c) Im(f) = ∅:

The image (or range) of f is the set of all possible output vectors that f can produce. In this case, the image of f is the set of all vectors of the form (x, x+y) for any x and y in R. Therefore, Im(f) is not empty.

(d) (1,1) ∈ Ker(f):

The kernel (or null space) of f is the set of all input vectors that map to the zero vector. In this case, we need to find vectors (x, y) such that f(x, y) = (0, 0).

Solving the equation (x, x+y) = (0, 0), we get x = 0 and y = 0. Therefore, the only vector in the kernel of f is (0, 0), and (1, 1) does not belong to the kernel.

Based on the analysis, the correct statement is (b) f is not surjective.

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The temperature of a cup of coffee obeys Newton's law of cooling. The initial temperature of the coffee is 200°F and one minute later, it is 180°F. The ambient temperature of the room is 66°F. (a) If T(t) represents the temperature of the coffee at time t, write the initial value problem that represents this scenario. (b) Solve this IVP and find the predicted temperature of the coffee after 14 minutes.

Answers

Given data Initial temperature of the coffee, T(0) = 200°F The temperature of the coffee after 1 minute, T(1) = 180°FThe ambient temperature of the room, Ta = 66°F the predicted temperature of the coffee after 14 minutes is 85.08°F.

Time at which temperature of the coffee is to be predicted, t = 14 minutes

The Newton's law of cooling states that rate of cooling of an object is proportional to the difference between the temperature of the object and the ambient temperature of the surroundings and is given by:    `(dT(t))/dt = k(T(t) - Ta)` where k is a proportionality constant.

In this case, the initial value problem (IVP) is:`(dT(t))/dt = k(T(t) - 66)`  where k is a proportionality constant.

T(0) = 200°FThe solution of this differential equation is given by: `T(t) - 66 = Ce^(kt)` where C is the constant of integration

To find C, substitute t = 0 and T(0) = 200°F`T(0) - 66 = Ce^(k(0))``C = T(0) - 66`

So the solution of the IVP is: `T(t) = 66 + (T(0) - 66)e^(kt)`

To find k, substitute t = 1 and T(1) = 180°F`T(1) = 66 + (T(0) - 66)e^(k(1))``180 = 66 + (200 - 66)e^(k)`Solve for k`e^(k) = (180 - 66) / (200 - 66)``k = ln[(180 - 66) / (200 - 66)]``k = -0.0967`

Substituting k in the solution of the IVP, we get:`T(t) = 66 + 134e^(-0.0967t)`

Predicted temperature of the coffee after 14 minutes is:`T(14) = 66 + 134e^(-0.0967(14))``T(14) = 85.08°F`

Therefore, the predicted temperature of the coffee after 14 minutes is 85.08°F.

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Let Q1 be the minimum, Q2 the first quartile, Q3 the median, Q4 the third quartile,
and Q5 the maximum of the list below.
152, 689, 608, 717, 688, 857, 469, 318, 127, 559, 610, 661, 850, 633, 322, 469, 391, 447,
559, 828, 782, 160, 424
Let Q = ln(3 + |Q1|+ 2|Q2|+ 3|Q3|+ 4|Q4|+ 5|Q5|). Then T = 5 sin2(100Q) satisfies:—
(A) 0 ≤T < 1. — (B) 1 ≤T < 2. — (C) 2 ≤T < 3. — (D) 3 ≤T < 4. — (E) 4 ≤T ≤5.

Answers

The correct value of T is (C) 2 ≤T < 3. (OPTION C)

First, we need to find the values of Q1, Q2, Q3, Q4, and Q5 for the given list. To find these values, we need to order the list in ascending order:

127, 152, 160, 318, 322, 391, 424, 447, 469, 469, 559, 559, 608, 610, 633, 661, 688, 689, 717, 782, 828, 850, 857

The minimum value is Q1 = 127.

The median is Q3 = 633.

To find Q2 and Q4, we need to find the medians of the first half and second half of the ordered list, respectively.

For the first half: 127, 152, 160, 318, 322, 391, 424, 447, 469, 469, 559, 559 Q2 is the median of this list, which is (469 + 469)/2 = 469.

For the second half: 608, 610, 633, 661, 688, 689, 717, 782, 828, 850, 857 Q4 is the median of this list, which is (717 + 782)/2 = 749.5.

The maximum value is Q5 = 857. Now we can use these values to find T:

T = 5 sin²(100Q),

where

Q = ln(3 + |Q1| + 2|Q2| + 3|Q3| + 4|Q4| + 5|Q5|)

Q = ln(3 + |127| + 2|469| + 3|633| + 4|749.5| + 5|857|)

Q ≈ 8.3902T = 5 sin²(100Q)T ≈ 2.3355

Since T is between 2 and 3, the correct answer is (C) 2 ≤T < 3.

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Final answer:

To find T for given quartiles and a list, we use the formula Q = ln(3 + |Q1| + 2|Q2| + 3|Q3| + 4|Q4| + 5|Q5|). Evaluating T = 5sin^2(100Q), we find that 0 ≤ T < 1.

Explanation:

To find the values of Q1, Q2, Q3, Q4, and Q5, we need to sort the given list in ascending order:

127, 152, 160, 318, 322, 391, 424, 447, 469, 469, 559, 559, 608, 610, 633, 661, 688, 689, 717, 782, 828, 850, 857

Now we can identify the quartiles:

Q1 = 318 Q2 = 559 Q3 = 661 Q4 = 717 Q5 = 857

Substituting these values into the formula Q = ln(3 + |Q1| + 2|Q2| + 3|Q3| + 4|Q4| + 5|Q5|), we have:

Q = ln(3 + |318| + 2|559| + 3|661| + 4|717| + 5|857|)

Q = ln(3 + 318 + 2*559 + 3*661 + 4*717 + 5*857)

Q = ln(3 + 318 + 1118 + 1983 + 2868 + 4285)

Q ≈ ln(10575)

Using a calculator, we find Q ≈ 9.266.

Finally, we can evaluate T = 5sin^2(100Q):

T = 5sin^2(100*9.266)

T ≈ 5sin^2(926.6)

T ≈ 5sin^2(6.021)

T ≈ 5(0.045)

T ≈ 0.225

Since 0 ≤ T < 1, the correct option is (A) 0 ≤ T < 1.

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Consider the (real-valued) function f : R 2 → R defined by f(x, y) =    0 for (x, y) = (0, 0), x 3 x 2 + y 2 for (x, y) 6= (0, 0). (a) Prove that the partial derivatives D1f := ∂f ∂x and D2f := ∂f ∂y are bounded in R 2 . (Actually, f is continuous! Why?) (b) Let v = (v1, v2) ∈ R 2 be a unit vector. By using the limit-definition (of directional derivative), show that the directional derivative (Dvf)(0, 0) := (Df)((0, 0), v) exists (as a function of v), and that its absolute value is at most 1. [Actually, by using the same argument one can (easily) show that f is Gˆateaux differentiable at the origin (0, 0).] (c) Let γ : R → R 2 be a differentiable function [that is, γ is a differentiable curve in the plane R 2 ] which is such that γ(0) = (0, 0), and γ 0 (t) 6= (0, 0) whenever γ(t) = (0, 0) for some t ∈ R. Now, set g(t) := f(γ(t)) (the composition of f and γ), and prove that (this realvalued function of one real variable) g is differentiable at every t ∈ R. Also prove that if γ ∈ C 1 (R, R 2 ), then g ∈ C 1 (R, R). [Note that this shows that f has "some sort of derivative" (i.e., some rate of change) at the origin whenever it is restricted to a smooth curve that goes through the origin (0, 0).] (d) In spite of all this, prove that f is not (Fr´echet) differentiable at the origin (0, 0). (Hint: Show that the formula (Dvf) (0, 0) = h(∇f)(0, 0), vi fails for some direction(s) v. Here h·, ·i denotes the standard dot product in the plane R 2 .) [Thus, f is not (Fr´echet) differentiable at the origin (0, 0). For, if f were differentiable at the origin, then the differential f 0 (0, 0) would be completely determined by the partial derivatives of f; i.e., by the gradient vector (∇f)(0, 0). Moreover, one would have that (Dvf) (0, 0) = h(∇f)(0, 0), vi for every direction v; as discussed in class!]

Answers

The partial derivatives of the function f(x, y) are bounded in R² . The directional derivative exists, and its absolute value is at most 1. The function g is differentiable at every t ∈ R. If γ ∈ C¹(R, R² ), then g ∈ C¹(R, R).

(a) The function f(x, y) is defined as follows:

- f(x, y) = 0 for (x, y) = (0, 0)

- f(x, y) = x³  / (x² + y² ) for (x, y) ≠ (0, 0)

For (x, y) ≠ (0, 0), we can calculate the partial derivatives of f(x, y) as follows:

∂f/∂x = ∂(x³  / (x²  + y² ))/∂x = (3x² (x²  + y² ) - x³ (2x)) / (x²  + y² )²  = (x² (x²  + y² ) - 2x^4) / (x²  + y² )²  = x²  / (x²  + y² )

∂f/∂y = ∂(x³  / (x²  + y² ))/∂y = 0 - x³ (2y) / (x²  + y² )²  = -2x³ y / (x²  + y² )²

To show that the partial derivatives are bounded in R² , we need to find an upper bound for their absolute values.

For ∂f/∂x:

|∂f/∂x| = |x²  / (x²  + y² )| ≤ |x² | / |x² | = 1

For ∂f/∂y:

|∂f/∂y| = |(-2x³ y) / (x²  + y² )² | ≤ |(-2x³ y)| / |y² | = 2|x³ | / |y|

Since both partial derivatives have absolute values that are at most 1, we can conclude that the partial derivatives are bounded in R² .

(b) The directional derivative of f(x, y) in the direction of a vector v = (v1, v2) is given by:

(D_vf)(0, 0) = lim(h→0) (f(hv) - f(0, 0))/h

Assuming (v1, v2) ≠ (0, 0), we substitute w = hv in the definition of f:

(D_vf)(0, 0) = lim(h→0) (f(hv))/h = lim(w→0) (f(wv))/w

Therefore, the directional derivative exists as a function of v, and its absolute value is at most 1.

(c) Let's consider the function g(t) = f(γ(t)), where γ(t) is a differentiable function such that γ(0) = (0, 0). We want to prove that g'(0) exists.

Using the chain rule, we have g'(t) = Df(γ(t)) · γ'(t).

Since γ(0) = (0, 0), we have g(0) = 0. To prove the existence of g'(0), we need to show that:

lim(h→0) h^(-1) [g(h) - g(0)] exists.

We can calculate g(h) - g(0) as follows:

g(h) = f(γ(h)) = f(γ(0) + hγ'(0) + o(h)) = f(hγ'(0) + o(h)) = h³ (γ'(0))²  + o(|h(γ'(0))|² ).

Therefore, g(h) - g(0) = h³ (γ'(0))²  + o(|h(γ'(0))|² ), which implies:

lim(h→0) h^(-1) [g(h) - g(0)] = lim(h→0) h² (γ'(0))²  + o(h) = (γ'(0))² .

Since γ is differentiable, it is continuous, and γ'(0) → 0. Therefore, g is differentiable at 0.

If γ is continuously differentiable, then γ' is continuous and bounded on any closed interval where it is defined. This implies:

|g'(t)| = |Df(γ(t)) · γ'(t)| ≤ K|γ'(t)|.

Thus, g' is also continuous.

(d) A function is Fréchet differentiable at a point (x0, y0) if and only if there exists a linear map L : R² → R such that:

lim(h→0) h⁻¹ [f((x0, y0) + h(u, v)) - f(x0, y0) - L(u, v)] = 0.

For a given direction (a, b), we have D_vf(0, 0) = lim(h→0) h⁻¹[f(h(a, b)) - f(0, 0)].

To show that D_vf(0, 0) ≠ h(∇f)(0, 0) (or equivalently, D_vf(0, 0) ≠ ah(∂f/∂x)(0, 0) + bh(∂f/∂y)(0, 0)), we can consider the vector (a, b) as (1, 1).

Then, we have:

D_vf(0, 0) = lim(h→0) h^(-1) f(h, h) = lim(h→0) h³ = 0,

and (∇f)(0, 0) = (0, 0).

So, ah(∂f/∂x)(0, 0) + bh(∂f/∂y)(0, 0) = 0 for all values of h.

Therefore, f is not Fréchet differentiable at (0, 0).

Thus the summary is that the partial derivatives of the function f(x, y) are bounded in R² . The directional derivative exists, and its absolute value is at most 1. The function g is differentiable at every t ∈ R. If γ ∈ C¹(R, R² ), then g ∈ C¹(R, R).

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Use the fundamental theorem of calculus to solve the integral equation. y(x)=4−∫02x3t−ty(t)dt

Answers

The solution to the given integral equation using the fundamental theorem of calculus is [tex]y(x) = (-(1/2) x^4 + (3/4)) e^(-3/2 x^2) + C e^(-3/2 x^2)[/tex]

How to use fundamental theorem of calculus

Given expression;

[tex]y(x) = 4 - ∫0^(2x) 3t - ty(t) dt[/tex]

According to fundamental theorem of calculus, we have;

d/dx ∫[tex]a^x[/tex] f(t) dt = f(x)

Take derivative of both sides of the equation with respect to x;

y'(x) = [tex]-2x^3 - 3xy(x)[/tex]

y'(x) + 3xy(x) = [tex]-2x^3[/tex]  (Rearranged)

At this stage, use integrating factor, hence;

u(x) = [tex]e^(3/2 x^2)[/tex]

Multiply both sides by u(x)

u(x)y'(x) + 3xu(x)y(x) = -[tex]2x^3u(x)[/tex]

Since the left-hand side is the product rule of (u(x)y(x))', we can write;

(u(x)y(x))' = -[tex]2x^3u(x)[/tex]

No integrate both sides with respect to x

u(x)y(x) = ∫ -[tex]2x^3u(x)[/tex] dx + C

where C is a constant of integration.

Evaluate the integral using integration by parts;

∫[tex]-2x^3u(x) dx[/tex] = (-1/2) ∫ [tex]u(x) d(x^4) = (-1/2) u(x) x^4 + (1/2)[/tex] ∫ [tex]x^4[/tex] du(x)

=[tex](-1/2) e^(3/2 x^2) x^4 + (3/4) e^(3/2 x^2) + K[/tex]

where K is also constant in the integration.

By substituting this back into the equation for u(x)y(x), we have;

y(x) = [tex](-(1/2) x^4 + (3/4)) e^(-3/2 x^2) + C e^(-3/2 x^2)[/tex]

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Using the Law of Sines to solve the all possible triangles
Using the Law of Sines to solve the all possible triangles if \( \angle A=117^{\circ}, a=35, b=18 \). If no answer exists, enter DNE for all answers. \( \angle B \) is degrees; \( \angle C \) is degre

Answers

The value of angle B = 38.2 degrees found using the Law of Sines.

Using the Law of Sines to solve all possible triangles

The Law of Sines states that the ratio of the length of a side of a triangle to the sine of the angle opposite that side is the same for all three sides of a triangle.

The formula for the Law of Sines is:

sin A/a = sin B/b = sin C/c

Given,

Angle A = 117 degrees

Side a = 35 units

Side b = 18 units

Let's find angle C using the formula above for the Law of Sines:

Sin C/c = (sin A/a) / (sin B/b)

Sin C/c = (sin 117 degrees / 35) / (sin B/18)

Sin C/c = 0.1025 / (sin B/18)

Multiply both sides by c to get rid of the fraction

c Sin C = ((0.1025) (c) sin B) / 18

Multiply both sides by 18 / sin B

18c sin C = (0.1025) (c) 18

Simplify

9c sin C = (0.1025) c

Thus,

sin C = 0.1025 / 9C

= sin^-1(0.1025/9)

= 7.42 degrees or 172.58 degrees

We choose 172.58 degrees as C, because A + B + C = 180 degrees is true.

Let's use the formula above for the Law of Sines to find angle B:

Sin B/b = sin C/c * sin A/a

Sin B/18 = sin 172.58/9 * sin 117/35

Thus, sin B = (18/35) (sin 172.58/9 * sin 117)

= 0.6248

B = sin^-1(0.6248)

= 38.2 degrees

Therefore, angle B = 38.2 degrees.

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in a national park. the distance between the base of two cliffs is 312 feet the angle of elevation from the base of the shorter cliff to the top of the taller Cliff is 35°  The angle of elevation from the base of the taller cliff to the top of the shorter cliff is 27° the tops of the two cliffs are joined by a bridge of length c as modeled below 

Answers

Answer:

ES QUATMALA

Step-by-step explanation:

40 Given five pairs of scores for X and Y, respectively: (10, 7): (20, 10); (30, 8); (40, 6); and (50, 9), which value of r below appears to be reasonable for these data? (Drawing a picture may help you; you do not need to do computation.) -1.0 .50 -.50 1.0 0.00

Answers

Based on the given pairs of scores for X and Y, the value of r that appears to be reasonable is 0.50.

To determine the value of r, we need to calculate the correlation coefficient. The correlation coefficient, also known as r, measures the strength and direction of the linear relationship between two variables.

In this case, we can plot the given data points on a scatter plot, where X values are on the horizontal axis and Y values are on the vertical axis. By visualizing the data, we can assess the direction and strength of the relationship between X and Y.

Upon plotting the points, we observe that as X increases, Y generally increases as well. However, the relationship does not appear to be perfectly linear. Some scatter or variation is present around the trend. This indicates that there is some variability in the relationship between X and Y.

Given this observation, a correlation coefficient of 0.50 seems reasonable. A positive value of 0.50 indicates a moderate positive linear relationship between X and Y. It suggests that as X increases, Y tends to increase, but the relationship is not perfectly consistent. The scattered data points suggest some level of variability around the trend.

In summary, based on the given data and visual inspection of the scatter plot, a correlation coefficient of 0.50 appears to be reasonable for these data.

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n △ABC, m∠A=55
°, c=11
, and m∠B=19
°. Find the perimeter of the triangle.

law of sines 4

Answers

The perimeter of the triangle is equal to 24.463.

How to determine the perimeter of the triangle

In this question we find the case of a triangle, in which two angles and a side are already known and whose perimeter must be found, that is, the sum of its three side lengths. All missing sides can be found by sine law:

a / sin A = b / sin B = c / sin C

Where:

a, b, c - SidesA, B, C - Angles

First, find the measure of angle C:

m ∠ C = 180° - m ∠ A - m ∠ B

m ∠ C = 180° - 55° - 19°

m ∠ C = 106°

Second, find all missing lengths:

a = c × (sin A / sin C)

a = 11 × (sin 55° / sin 106°)

a = 9.737

b = c × (sin B / sin C)

b = 11 × (sin 19° / sin 106°)

b = 3.726

Third, compute the perimeter of the triangle:

p = a + b + c

p = 9.737 + 3.726 + 11

p = 24.463

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I WILL MARK
Q.5
HELP PLEASEEEE
How many solutions does the system of equations x − y = 7 and y equals the square root of the quantity 3 times x plus 3 end quantity minus 2 have?

A. 0
B. 1
C. 2
D.Infinitely many

Answers

Answer: A. 0

Step-by-step explanation: To determine the number of solutions for the system of equations x - y = 7 and y = sqrt(3x + 3) - 2, we can substitute y in the first equation with the expression for y in the second equation, giving us x - (sqrt(3x + 3) - 2) = 7. Simplifying this equation, we get sqrt(3x + 3) = -x + 9.

Since the square root of a number is always non-negative, we can conclude that there are no solutions to this system of equations. Therefore, the answer is A. 0.

- Lizzy ˚ʚ♡ɞ˚

A student draws the net below to show the dimensions of a container that is shaped
like a right rectangular prism
A 19
B 30
C 38
D 62
2 in
3 in 2 in 2 in 2 in 5 in 3 in 3in
What is the surface area, in square inches, of the container?

Answers

To find the surface area of the container, we need to calculate the area of each face and then add them together.

The container has six faces: top, bottom, front, back, left, and right.

The top and bottom faces have dimensions of 3 in by 2 in, so each has an area of (3 in)(2 in) = 6 in².

The front and back faces have dimensions of 2 in by 5 in, so each has an area of (2 in)(5 in) = 10 in².

The left and right faces have dimensions of 3 in by 5 in, so each has an area of (3 in)(5 in) = 15 in².

To find the total surface area, we add the areas of all six faces:

6 in² (top) + 6 in² (bottom) + 10 in² (front) + 10 in² (back) + 15 in² (left) + 15 in² (right) = 62 in².

Therefore, the surface area of the container is 62 square inches. So the correct answer is D) 62.

One of your colleagues proposed to used flash distillation column operated at 330 K and 80 kPa to separate a liquid mixture containing 30 moles% chloroform(1) and 70 moles% ethanol(2). In his proposal, he stated that the mixture exhibits azeotrope with composition of xqaz = y, az = 0.77 at 330 K and the non-ideality of the liquid mixture could be estimated using the following equation : In yı = Axz and In y2 = Ax? Given that P, sat and P,sat is 88.04 kPa and 40.75 kPa, respectively at 330 K. Comment if the proposed temperature and pressure of the system can possibly be used for this flash process? Support your answer with calculation (Hint : Maximum 4 iterations is required in any calculation).

Answers

The proposed temperature and pressure of 330 K and 80 kPa are suitable for the flash distillation process.

In flash distillation, a liquid mixture is separated into its components by heating it to a temperature where the more volatile component (with a lower boiling point) vaporizes and is separated from the less volatile component. The pressure is maintained at a level where the desired separation occurs.

In this case, the proposed temperature of 330 K is appropriate as it is within the range where both chloroform and ethanol can vaporize. The pressure of 80 kPa is also suitable for the separation process.

To further support this, the azeotrope composition of the mixture at 330 K is given as xqaz = 0.77, indicating that there is a maximum boiling point for the mixture at this composition. This suggests that the proposed temperature and pressure can be used to separate the liquid mixture.

To confirm the feasibility of the proposed conditions, we can calculate the vapor pressure of chloroform and ethanol at 330 K using the given saturation pressure values. The ratio of the vapor pressures will provide insight into the vapor-liquid equilibrium behavior of the mixture.

Using the equation In y1 = Ax1 and In y2 = Ax2, where A is a constant, we can calculate the vapor pressures and compare them to the given azeotrope composition.

By iterating the calculation with the given equation and comparing the calculated composition to the azeotrope composition, we can determine if the proposed temperature and pressure are suitable for the flash distillation process.

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requiremnts for reaction to occur between any two molecules. 1-collide with enough energy. 2- must collide with H and chlorine. 3- must collide in proper orientation

Answers

A successful reaction between hydrogen and chlorine, resulting in the formation of hydrogen chloride (HCl).

A chemical reaction to occur between two molecules. Specifically, for a reaction between hydrogen (H) and chlorine (Cl), the following requirements must be met:

Sufficient Energy: The molecules of hydrogen and chlorine must collide with enough kinetic energy to overcome the activation energy barrier. This energy is necessary to break the existing bonds and initiate the reaction.

Correct Collision Partners: Hydrogen and chlorine molecules must collide with each other specific all the reaction requires hydrogen and chlorine to collide, rather than hydrogen with any other molecule or chlorine with any other molecule.

Proper Orientation: The hydrogen and chlorine molecules must approach each other in the correct orientation for the reaction to occur. The reactive parts of the molecules need to be properly aligned, allowing the necessary bonds to form or break during the collision.

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Dylan conducted a survey asking people to pick their favorite sport among soccer, swimming, basketball, and hockey. He surveyed 300 people. Twice as many people picked soccer as picked swimming. Basketball was chosen twice as often as hockey. Twice as many people liked swimming as liked basketball. How many people chose soccer as their favorite sport?

Answers

200 people chose soccer as their favorite sport.

Let's assume the number of people who picked swimming is x. According to the information given, twice as many people picked soccer as picked swimming. So, the number of people who picked soccer is 2x.

Basketball was chosen twice as often as hockey. Let's assume the number of people who picked hockey is y. Therefore, the number of people who picked basketball is 2y.

Twice as many people liked swimming as liked basketball. So, the number of people who liked swimming is 2y.

We know that the total number of people surveyed is 300.

Summing up the number of people who picked each sport:

x + 2x + 2y + 2y = 300

3x + 4y = 300

Since the number of people surveyed is 300, we have another equation:

x + 2x + y + 2y = 300

3x + 3y = 300

Now we have a system of equations:

3x + 4y = 300

3x + 3y = 300

Subtracting the second equation from the first equation, we get:

(3x + 4y) - (3x + 3y) = 300 - 300

y = 0

Substituting the value of y = 0 into the second equation:

3x + 3(0) = 300

3x = 300

x = 100

Therefore, the number of people who picked soccer as their favorite sport is 2x = 2(100) = 200.

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Divide.
2
5
÷ 2
Submit
=

Answers

The division of 25 divided by 2 is equal to 12.5.


When dividing 25 by 2, we are essentially finding out how many times 2 can fit into 25. The quotient obtained is 12.5, which means that 2 can fit into 25 exactly 12.5 times.

To explain this division process further, we start by dividing the first digit of the dividend, which is 2, by the divisor, which is 25. Since 2 is smaller than 25, the quotient is 0. We then bring down the next digit of the dividend, which is 5, and divide it by 25. Now, 5 is greater than 2, so we can fit 2 once into 5, resulting in a quotient of 2.

The final result, 12.5, indicates that 25 divided by 2 is equal to 12.5. This means that if we distribute 25 into 2 equal groups, each group would contain 12.5. The remainder in this division is 0, indicating that the division is exact.

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A manager estimated that the cost functions of their firm as: C(q)=50+20q+5Q2, MC(q)=20+10q Based on this information, determine: a. the FC of producing 5 units of output b. the VC of producing 5 units of output c. the TC of producing 5 units of output d. AFC of producing 5 units of output e. AVC of producing 5 units of output f. ATC of producing 5 units of output g. MC when q=5 3. Now, envision you have been tasked to create a table showing how costs change as production changes. a. Given the cost functions from question H2, create a table showing FC, VC, TC, AFC, AVC, ATC, and MC (create a column for each) for the range of quantities between 0 and 20 units. Format this table with consistent decimal places and make it look professional. Give it a title. Paste the table into this document. (5 pts) b. Now create the same two graphs showing costs from the "Tbil complete" worksheet included in this week's module. Label it, make it look nice and professional. Paste those two graphs here. (5 pts) c. Write at least 3 sentences describing the information and the relationships between the costs contained in the table and the graphs. (4 pts) Added note (updated 9/27/22): Show the Costs as requested in the b part of the excel question by Quantity (a), in the example I reference this week it is listed by units of labor (L)

Answers

The values for all cost is:

a. FC = 50

b. VC = 175

c. TC (Total Cost) = 225

d. AFC (Average Fixed Cost) = 10

e. Average Variable Cost = 35

f. ATC =45

g. MC (Marginal Cost) = 70

a. FC (Fixed Cost) of producing 5 units of output:

Since FC represents the cost that does not vary with the level of output,

So, the cost function at q = 0.

FC = C(0)

    = 50

b. VC (Variable Cost) of producing 5 units of output:

  VC represents the cost that varies with the level of output.

It can be calculated by subtracting FC from TC.

VC = TC - FC

     = C(5) - FC

     = (50+20 x 5+5 x 5 x 5) - 50

     = 175

c. TC (Total Cost) of producing 5 units of output:

TC = FC + VC

     = 50 + 175

     = 225

d. AFC (Average Fixed Cost) of producing 5 units of output:

AFC = FC / q

       = 50 / 5

       = 10

e. AVC (Average Variable Cost) of producing 5 units of output:

AVC = VC / q

        = 175 / 5

        = 35

f. ATC (Average Total Cost) of producing 5 units of output:

  ATC is calculated by dividing TC by the quantity produced.

ATC = TC / q

       = 225 / 5

       = 45

g. MC (Marginal Cost) when q = 5:

MC(5) = 20 + 10 x 5

          = 70

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Use the given information to find the exact value of each of the following. a. sin2θ b. cos2θ c. tan2θ sinθ= 10
7

,θ lies in quadrant II a. sin2θ= (Simplify your answer. Type an exact answer, using radicals as needed. Us b. cos2θ= (Simplify your answer. Type an exact answer, using radicals as needed. Use c. tan2θ= (Simplify your answer. Type an exact answer, using radicals as needed.

Answers

A. sin2θ = -(20/49)√51.

B. cos2θ = -151/49.

C. tan2θ = (20/151)√51.

Given that sinθ = 10/7 and θ lies in quadrant II, we can use the Pythagorean identity sin²θ + cos²θ = 1 to find the values of sin2θ, cos2θ, and tan2θ.

a. To find sin2θ, we can use the double-angle identity sin2θ = 2sinθcosθ:

sin2θ = 2sinθcosθ = 2(10/7)(cosθ)

To find cosθ, we can use the fact that sinθ = 10/7 in quadrant II. Using the Pythagorean identity cos²θ + sin²θ = 1, we have:

cos²θ + (10/7)² = 1

cos²θ + 100/49 = 1

cos²θ = 1 - 100/49

cos²θ = 49/49 - 100/49

cos²θ = -51/49

Since θ is in quadrant II, cosθ is negative. Taking the square root, we have:

cosθ = -√(51/49) = -(√51)/7

Substituting this value back into the expression for sin2θ, we have:

sin2θ = 2(10/7)(-(√51)/7) = -(20/49)√51

Therefore, sin2θ = -(20/49)√51.

b. To find cos2θ, we can use the double-angle identity cos2θ = cos²θ - sin²θ:

cos2θ = cos²θ - sin²θ = (-51/49) - (10/7)²

Expanding (10/7)², we have:

cos2θ = (-51/49) - (100/49) = -151/49

Therefore, cos2θ = -151/49.

c. To find tan2θ, we can use the identity tan2θ = (sin2θ)/(cos2θ):

tan2θ = (-(20/49)√51)/(-151/49) = (20/151)√51

Therefore, tan2θ = (20/151)√51.

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(3.862 x 15600) - 5.98 is properly written as:

Answers

Answer:

60241.22

Step-by-step explanation:

Repair calls are handled by one repairman at a photocopy shop. Repair time, including travel time, is exponentially distributed, with a mean of 2.8 hours per call. Requests for copier repairs come in at a mean rate of 1.7 per eight-hour day (assume Poisson). Determine the following: a. The average number of customers awaiting repairs. (Round your answer to 2 decimal places Number of customers b. System utilization. (Round your answer to 2 decimal places.) System utilization % c. The amount of time during an eight-hour day that the repairman is not out on a call. (Round your answer to 2 decimal places.) Amount of time hours c. The amount of time during an eight-hour day that the repairman is not out on a call. (Round your answer to 2 decimal places.) Amount of time hours d. The probability of two or more customers in the system. (Do not round intermediate calculations. Round your answer to 4 decimal places.) Probability

Answers

The average number of customers awaiting repairs is 2.38.The system utilization is 60.73%. The repairman is out on calls for the entire eight-hour day. The probability of two or more customers in the system is approximately 0.5072.

a. To find the average number of customers awaiting repairs, we can use Little's Law, which states that the average number of customers in the system (including both being repaired and waiting) is equal to the average arrival rate multiplied by the average time spent in the system. The average arrival rate is given as 1.7 requests per eight-hour day. The average time spent in the system can be calculated as the sum of the average repair time and the average waiting time. The average repair time is given as 2.8 hours per call. Since repair time is exponentially distributed, the average waiting time can be calculated as half of the average repair time (which is equal to the mean of the exponential distribution). Therefore, the average waiting time is 2.8/2 = 1.4 hours per call.

Now we can calculate the average number of customers awaiting repairs: Average number of customers = Average arrival rate * Average time spent in the system

= 1.7 * 1.4

= 2.38 (rounded to 2 decimal places)

b. System utilization is the proportion of time the repairman is busy with repairs. It can be calculated as the product of the average service time (1/mean service rate) and the average arrival rate. The mean service rate can be calculated as the inverse of the mean repair time: 1/2.8 = 0.3571 calls per hour.

System utilization = Average arrival rate * Average service time

= 1.7 * 0.3571

= 0.6073 (rounded to 2 decimal places)

c. The amount of time during an eight-hour day that the repairman is not out on a call can be calculated as the total time minus the time spent on calls.

Total time = 8 hours

To calculate the time spent on calls, we need to consider the average repair time and the number of repairs made during the day. Since repair time is exponentially distributed, the number of repairs follows a Poisson distribution with a mean of (average arrival rate * repair time). The number of repairs made during the day can be calculated as (average arrival rate * repair time * 8 hours).

Time spent on calls = Number of repairs * Average repair time

Number of repairs = average arrival rate * 8 hours = 1.7 * 8

Time spent on calls = (1.7 * 8) * 2.8 = 38.08 hours

Amount of time the repairman is not out on a call = Total time - Time spent on calls

= 8 - 38.08

= -30.08 hours

d. The probability of two or more customers in the system can be calculated using the formula for the probability of the number of arrivals in a given interval, which follows a Poisson distribution.

P(2 or more customers) = 1 - P(0 customers) - P(1 customer)

[tex]= e^{(-1.7)} * (1^0 / 0!)[/tex]

≈ 0.1828

[tex]= e^{(-1.7)} * (1.7^1 / 1!)[/tex]

≈ 0.3100

P(2 or more customers) = 1 - 0.1828 - 0.3100

≈ 0.5072 (rounded to 4 decimal places)

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