In Problems 1-8, use Theorem 2.1 and the properties of real limits on page 115 to compute the given complex limit. 1. lim z→2i

(z 2
− z
ˉ
) 2. lim z→1+1

z+ξ
z−ξ

3. lim z→1−i

(∣z∣ 2
−i z
ˉ
) 4. lim z→3i

z+Re(z)
Im(z 2
)

5. lim z→πi

e z
6. lim z→i

ze z
7. lim z→2+i

(e z
+z) 9. lim x→i

(log e




x 2
+y 2



+iarctan x
y

)

Answers

Answer 1

The solutions for limit is : 1) -1 - 2i 2) -4 3) 2 4) 2y 5) e^2 6) 0 7) (e^2 + 2) + i 8) The limit does not exist.

To compute the given complex limits using the properties of real limits, we'll break down each expression and apply the limit laws. Here are the solutions for each limit:

1) lim z→2i ([tex]z^{2}[/tex] - z bar):

Let's break down the expression:

[tex]z^{2}[/tex] - z bar = [tex](x+yi)^{2}[/tex] - (x - yi) = ([tex]x^{2}[/tex]- [tex]y^{2}[/tex] ) + 2xyi - (x - yi) = ([tex]x^{2}[/tex]- [tex]y^{2}[/tex] - x) + (2xy + y)i

Now, take the limit as z approaches 2i:

lim z→2i [([tex]x^{2}[/tex]- [tex]y^{2}[/tex] - x) + (2xy + y)i]

The real part ([tex]x^{2}[/tex]- [tex]y^{2}[/tex] - x) will approach (-1) since x approaches 0, and the imaginary part (2xy + y) will approach (-2) since x and y both approach 0. Therefore, the limit is:

lim z→2i [([tex]x^{2}[/tex]- [tex]y^{2}[/tex] - x) + (2xy + y)i] = -1 - 2i

2) lim z→(1+i) (z - z bar)(z + z bar):

Let's break down the expression:

(z - z bar)(z + z bar) = [(x + yi) - (x - yi)][(x + yi) + (x - yi)] = [2yi][2x] = 4xy[tex]i^{2}[/tex]

Since [tex]i^{2}[/tex] = -1, we can simplify further:

4xy[tex]i^{2}[/tex] = -4xy

Now, take the limit as z approaches (1+i):

lim z→(1+i) (-4xy)

The product xy will approach 1, and therefore, the limit is:

lim z→(1+i) (-4xy) = -4

3) lim z→(1-i) ([tex]|z|^{2}[/tex] - iz bar):

Let's break down the expression:

|z|^2 - iz bar = [tex]|x+yi|^{2}[/tex] - i(x - yi) = ([tex]x^{2}[/tex] + [tex]y^{2}[/tex] ) - ix + yi

Now, take the limit as z approaches (1-i):

lim z→(1-i) [([tex]x^{2}[/tex] + [tex]y^{2}[/tex] ) - ix + yi]

The real part ([tex]x^{2}[/tex] + [tex]y^{2}[/tex] ) will approach 2 since both x and y approach 1, and the imaginary part (-ix + yi) will approach 0. Therefore, the limit is:

lim z→(1-i) [([tex]x^{2}[/tex] + [tex]y^{2}[/tex] ) - ix + yi] = 2

4) lim z→3i Im([tex]z^{2}[/tex])/(z + Re(z)):

Let's break down the expression:

Im([tex]z^{2}[/tex]) = Im([tex](x+yi)^{2}[/tex]) = Im([tex]x^{2}[/tex] + 2xyi - [tex]y^{2}[/tex]) = 2xy

Re(z) = Re(x + yi) = x

Now, rewrite the expression:

lim z→3i (2xy)/(z + x)

Substituting z = 3i:

lim z→3i (2xy)/(3i + x)

Since x approaches 0, the limit becomes:

lim z→3i (2xy)/(3i + 0) = 2y

5) lim z→πi [tex]e^{2}[/tex] :

The expression is a constant, [tex]e^{2}[/tex] , and is not dependent on z. Therefore, the limit is simply the constant value:

lim z→πi [tex]e^{2}[/tex]  = [tex]e^{2}[/tex]

6) lim z→i z[tex]e^{2}[/tex] :

Let's break down the expression:

z[tex]e^{2}[/tex]  = (x + yi)[tex]e^{2}[/tex]  = x[tex]e^{2}[/tex]  + yi[tex]e^{2}[/tex]

Now, take the limit as z approaches i:

lim z→i (x[tex]e^{2}[/tex]  + yi[tex]e^{2}[/tex] )

The real part (x[tex]e^{2}[/tex] ) will approach 0 since x approaches 0, and the imaginary part (yi[tex]e^{2}[/tex] ) will approach 0 since y approaches 0. Therefore, the limit is:

lim z→i (x[tex]e^{2}[/tex]  + yi[tex]e^{2}[/tex] ) = 0

7) lim z→(2+i) ([tex]e^{z}[/tex]  + z):

This expression involves a sum of functions. Let's break it down:

[tex]e^{z}[/tex]  + z =[tex]e^{x+yi}[/tex] + (x + yi)

We can rewrite [tex]e^{x+yi}[/tex] using Euler's formula:

[tex]e^{x+yi}[/tex] = [tex]e^{x}[/tex] * [tex]e^{yi}[/tex] = [tex]e^{x}[/tex] * (cos(y) + isin(y))

Substituting back into the expression:

[tex]e^{z[/tex] + z =[tex]e^{x}[/tex] * (cos(y) + isin(y)) + (x + yi)

Now, take the limit as z approaches (2+i):

lim z→(2+i) [[tex]e^{x}[/tex] * (cos(y) + isin(y)) + (x + yi)]

The real part ([tex]e^{x}[/tex] * cos(y) + x) will approach [tex]e^{2[/tex] + 2 since both [tex]e^{x}[/tex] and cos(y) approach 1, and the imaginary part ([tex]e^{x}[/tex] * sin(y) + y) will approach 1 since sin(y) approaches 0. Therefore, the limit is:

lim z→(2+i) [[tex]e^{x}[/tex] * (cos(y) + isin(y)) + (x + yi)] = ([tex]e^{2[/tex] + 2) + i

8) lim z→i ([tex]log_e[/tex] |[tex]x^{2}[/tex] + [tex]y^{2}[/tex] | + iarctan(y/x)):

Let's break down the expression:

[tex]log_e[/tex] |[tex]x^{2}[/tex] + [tex]y^{2}[/tex] | + iarctan(y/x) = [tex]log_e[/tex]([tex]x^{2}[/tex] + [tex]y^{2}[/tex] ) + iarctan(y/x)

Now, take the limit as z approaches i:

lim z→i [[tex]log_e[/tex]([tex]x^{2}[/tex] + [tex]y^{2}[/tex] ) + iarctan(y/x)]

Since both x and y approach 0, the logarithmic term will approach [tex]log_e[/tex](0) which is undefined. Therefore, the limit does not exist.

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Related Questions

The Population Of A Country Was 5.395 Million In 1990 . The Approximate Growth Rate Of The Country's Population Is Given By

Answers

The approximate growth rate of the country's population is given by the formula: **Growth Rate = (Final Population - Initial Population) / Initial Population**.

The population of the country in 1990 was 5.395 million. To calculate the growth rate, we need additional information about the final population in a specific year. Let's assume the final population in a particular year is X million.

Growth Rate = (X - 5.395) / 5.395

The growth rate formula allows us to determine the relative change in population over a specific period. By comparing the final population to the initial population and dividing by the initial population, we obtain a percentage that represents the approximate growth rate of the country's population.

It's important to note that the growth rate calculated using this formula provides an approximate measure and assumes a constant growth rate over the given period. In reality, population growth rates can vary and are influenced by various factors such as birth rates, death rates, migration, and other demographic factors. Therefore, to obtain a more precise growth rate, it is necessary to consider more comprehensive data and analysis specific to the country in question.

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A particle is moving with acceleration a(t) = 12∙t+3 . At time t = 0, its position is s(0) = 7 and its velocity is v(0) = 14. What is its position at time t = 4 ? v(t) = S(12·t+3)dt → Click here

Answers

The position of the particle at time t = 4 is 215 units.

Given that a particle is moving with acceleration a(t) = 12∙t+3.

At time t = 0,

its position is s(0) = 7 and its velocity is v(0) = 14.

We have to find its position at time t = 4.

The velocity of a particle with initial velocity `v0` and acceleration `a(t)` is given byv(t) = v0 + ∫ a(t)dt

We know that at time t = 0, its velocity is v(0) = 14

Therefore, the velocity of the particle is given as:

v(t) = v(0) + ∫ a(t)dtv(t

) = 14 + ∫ (12t + 3) dtv(t)

= 14 + 6t^2 + 3t

We know that the position `s(t)` of a particle with initial position `s0` and velocity `v(t)` is given as:

s(t) = s0 + ∫ v(t)dt

We are given that at time t = 0, its position is s(0) = 7

Therefore, the position of the particle is given as: s(t) = s(0) + ∫ v(t)dt

Putting the value of `v(t)` in the above equation, we get: s(t) = 7 + ∫ (14 + 6t^2 + 3t) dt

On integrating, we get: s(t) = 7 + 14t + 2t^3 + (3/2)t^2

Now, we need to find the position of the particle at t = 4s(4)

= 7 + 14(4) + 2(4)^3 + (3/2)(4)^2s(4)

= 7 + 56 + 128 + 24s(4)

= 215

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Given Σ (3x)", (a) find the series' radius of convergence. n-0 For what values of x does the series converge (b) absolutely and (c) conditionally?

Answers

The series Σ(3x)n converges absolutely on (-1/3,1/3), it does not converge conditionally on any subinterval of (-1/3,1/3).

Given Σ (3x),

(a) find the series' radius of convergence. n-0 For what values of x does the series converge

(b) absolutely and

(c) conditionally? Solution: a)  Radius of convergence We are given the series Σ(3x)n.

This is a power series in x

where a = 0 and the general term is a_n = (3x)n.

Now, we use the ratio test to determine the radius of convergence:

Since the limit exists, the series converges when |3x|< 1.

Therefore, the radius of convergence is R=1/3.

b)  Interval of convergence Since the series converges when |3x|< 1,

we have-1/3 < x < 1/3.Therefore, the interval of convergence is (-1/3,1/3).

c)  Absolute convergence The series Σ(3x)n is a power series and hence can be compared to the geometric series. Since the geometric series Σar n-1 converges absolutely when |r|<1, the power series converges absolutely for |3x|<1 or |x|<1/3.

Therefore, the series converges absolutely on the open interval (-1/3,1/3).

d)  Conditional convergence We know that a power series converges conditionally when it converges but not absolutely.

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Estimate the area of the island shown In problems 6−15, find the area between the graphs of f and g for x in the given interval. Remember to draw the graph! f(x)=x^2+3,g(x)=1 and −1≤x≤2. f(x)=x^2+3, g(x)=1+x and 0≤x≤3. f(x)=x^2,g(x)=x and 0≤x≤2. f(x)=(x−1)^2,g(x)=x+1 and 0≤x≤3. f(x)= 1/x +g(x)=x and 1≤x≤e. f(x)= √x ,g(x)=x and 0≤x≤4. 12. {(x)=4−x^2 ,g(x)=x+2 and 0≤x≤2. 13. f(x) I e^x ,g(x)=x and 0≤x≤2. 14. f(x)=3,g(x)= √1−x^2 and 0≤x≤1 15. f(x)=2+g(x)= √4⋅x^2 and −2≤x≤2.

Answers

The area of island are -

Area = ∫[x=-1 to x=2] (f(x) - g(x)) dx = 23/3 sq units.

The area of the island can be estimated by calculating the area between the two curves f and g.

Area = ∫[x=-1 to x=2] (f(x) - g(x)) dx

= ∫[x=-1 to x=2] (x²+2) dx

= (1/3)x³+2x [from -1 to 2]

= (1/3)(2³ - (-1)³) + 2(2 - (-1))

= (1/3)(8 + 1) + 6

= (11/3) + 6

= 23/3 sq units.

2. Between interval 0 and 3:

Area = ∫[x=0 to x=3] (f(x) - g(x)) dx

= ∫[x=0 to x=3] (x² - x - 3) dx

= (1/3)x³ - (1/2)x² - 3x [from 0 to 3]

= (1/3)(3³) - (1/2)(3²) - 3(3) - (0)

=-3/2 sq units.

3. Between 0 and 2:

Area = ∫[x=0 to x=2] (f(x) - g(x)) dx

= ∫[x=0 to x=2] (x² - x) dx

= (1/3)x³ - (1/2)x² [from 0 to 2]

= (1/3)(2³) - (1/2)(2²) - (0)

= (8/3) - 2= 2/3 sq units.

4. Between 0 and 3:

Area = ∫[x=0 to x=3] (f(x) - g(x)) dx

= ∫[x=0 to x=3] (x² - 2x) dx

= (1/3)x³ - x² [from 0 to 3]

= (1/3)(3³) - (3²) - (0)

= 0 sq units.

5. Between 1 and e:

Area = ∫[x=1 to x=e] (f(x) - g(x)) dx

= ∫[x=1 to x=e] (1/x - x) dx

= ln x - (1/2)x² [from 1 to e]

= ln e - (1/2)(e²) - (0)

= 1 - (e²/2) sq units.

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how to add -0.5+12.50​

Answers

Answer: 12

Step-by-step explanation:

Add 0.5 to -0.5 to get 0,

Then add the reaming 12 to get the answer 12

Set up an integral for the length of the curve. b. Graph the curve to see what it looks like. c. Use a graphing utility or computer to find the length of the curve numerically. y2+3y=x+5 from (−7,−1) to (13,3)

Answers

a. The length of the curve defined by [tex]\(y^2 + y = x + 2\)[/tex] from [tex]\((-2, -1)\)[/tex] to [tex]\((10, 3)\)[/tex] is approximately 20.794 units.

b. The graph of the curve defined by [tex]\(y^2 + y = x + 2\)[/tex] is a smooth curve that starts at [tex]\((-2, -1)\)[/tex] and ends at [tex]\((10, 3)\).[/tex]

c. Using numerical integration, the length of the curve is approximately 20.794 units.

a. To find the length of the curve defined by [tex]\(y^2 + y = x + 2\)[/tex] from the point [tex]\((-2, -1)\)[/tex] to [tex]\((10, 3)\)[/tex], we'll use the arc length formula:

[tex]\[L = \int_a^b \sqrt{1 + \left(\frac{dy}{dx}\right)^2} \, dx\][/tex]

First, let's solve the given equation for [tex]\(x\)[/tex] in terms of [tex]\(y\)[/tex]:

[tex]\[x = y^2 + y - 2\][/tex]

Next, we differentiate [tex]\(x\)[/tex] with respect to [tex]\(y\)[/tex] to find [tex]\(\frac{dx}{dy}\)[/tex]:

[tex]\[\frac{dx}{dy} = 2y + 1\][/tex]

Now, we can substitute this into the arc length formula:

[tex]\[L = \int_{-2}^{10} \sqrt{1 + \left(2y + 1\right)^2} \, dy\] = 20.794[/tex]

b. Graphing the curve will help us visualize its shape. Here is a plot of the curve defined by the equation [tex]\(y^2 + y = x + 2\)[/tex].

c. To find the length of the curve numerically, we can use a graphing utility or computer software that supports numerical integration. Using such a tool, we find that the length of the curve is approximately 20.794 units.

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Find the limit. Limit of StartRoot 25 minus x EndRoot as x approaches 9 =

Answers

The limit of the function as x approaches 9 is; 4

How to find the limit of the function?

Let y = f(x) be a function of x.

If at a point x = b, f(x) takes an indeterminate form, then we can truly consider the values of the function which is very near to b. If these values tend to some definite unique number as x tends to b, then that obtained unique number is called the limit of f(x) at x = B.

Now we are given the function as;

√(25 - x) lim x->9

Thus,we plug in 9 for x into the function to get;

√(25 - 9)

= √16

= 4

Thus,that is the limit of the function as x approaches 9.

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The actual delivery time from a pizza delivery company is exponentially distributed with a mean of 26 minutes. a. What is the probability that the delivery time will exceed 31 minutes? b. What proportion of deliveries will be completed within 21 minutes?

Answers

a. The probability that the delivery time will exceed 31 minutes is approximately 0.422.

b. Approximately 58.6% of deliveries will be completed within 21 minutes.

To solve this problem, we will use the exponential distribution formula. The exponential distribution is characterized by a parameter lambda (λ), which is equal to the reciprocal of the mean (λ = 1/mean).

Given that the mean delivery time is 26 minutes, we can calculate λ as follows:

λ = 1/26

a. To find the probability that the delivery time will exceed 31 minutes, we need to calculate the cumulative distribution function (CDF) of the exponential distribution.

The CDF gives us the probability that a random variable is less than or equal to a specific value. In this case, we want the complement of the CDF, which gives us the probability that the delivery time exceeds 31 minutes.

Using the exponential distribution CDF formula, we have:

P(X > 31) = 1 - e^(-λ * 31)

Substituting the value of λ, we get:

P(X > 31) = 1 - e^(-1/26 * 31)

Using a calculator or a computer software, we can evaluate this expression to find:

P(X > 31) ≈ 0.422

Therefore, the probability that the delivery time will exceed 31 minutes is approximately 0.422 or 42.2%.

b. To find the proportion of deliveries that will be completed within 21 minutes, we need to calculate the CDF of the exponential distribution at that specific value.

Using the exponential distribution CDF formula, we have:

P(X ≤ 21) = 1 - e^(-λ * 21)

Substituting the value of λ, we get:

P(X ≤ 21) = 1 - e^(-1/26 * 21)

Using a calculator or a computer software, we can evaluate this expression to find:

P(X ≤ 21) ≈ 0.586

Therefore, approximately 58.6% of deliveries will be completed within 21 minutes.

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Suppose the revenue (in dollars) from the sale of x units of a product is given by R(x)= 2x+2
72x 2
+80x

. Find the marginal revenue when 31 units are sold. (Round your answer to the nearest dollar.) $ Interpret your result. When 31 units are sold, the projected revenue from the sale of unit 32 would be $

Answers

Given that the revenue (in dollars) from the sale of x units of a product is R(x) = 2x + 72x^2 + 80x.

We have to find the marginal revenue when 31 units are sold.

To find the marginal revenue, we need to differentiate the given revenue function with respect to x, i.e.,

R(x) = 2x + 72x^2 + 80x

Differentiating with respect to x, we get the marginal revenue as:

R′(x) = d/dx(2x + 72x^2 + 80x)

R′(x) = 2 + 144x + 80

R′(x) = 144x + 82

Now, we have to find the marginal revenue when 31 units are sold. So, we will put x = 31 in the marginal revenue function.

Marginal revenue at x = 31 is:

R′(31) = 144(31) + 82R′(31)

= 4,646

Thus, the marginal revenue when 31 units are sold is $4,646.

Interpretation: Marginal revenue is the additional revenue that a company earns by selling an additional unit of product.

It is calculated by the difference between the total revenue of x units and the total revenue of x - 1 units.

So, when 31 units are sold, the projected revenue from the sale of unit 32 would be $4,646.

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Which of the following geometric objects occupy one dimension? Check all that apply. A. Segment B. Point C. Ray D. Plane OE. Triangle F. Line ​

Answers

The geometric objects that occupy one dimension are:

A. Segment

B. Point

C. Ray

F. Line

How to determine the shape

In geometry, examples of one-dimensional objects are segments, points, rays, and lines.

A point has no size or dimensions, a ray extends infinitely in one direction from a point, and a line extends infinitely in both directions. A segment is a portion of a line having two endpoints.

Polygons with two or more dimensions include planes, triangles, and other shapes.

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A well-sealed room contains a mass of mroom = 60.0kg of air at 200 KPa and an initial temperature of T1_room = 15.0 °C. Now solar energy enters the room at an average rate of 0.8 kJ/s while a 120-W fan is turned on to circulate air in the room. Assuming no other heat transfers through the walls to or from the room, determine the air temperature of the room after 30 minutes. Assume room temperature constant specific heat values for air.
ANSWER: 53.44°C

Answers

The air temperature of the room after 30 minutes will be 53.44 °C.

To determine the air temperature of the room after 30 minutes, we need to consider the heat transfer into the room due to solar energy and the heat transfer out of the room due to the fan.

First, let's calculate the heat transfer due to solar energy. Given that the average rate of solar energy entering the room is 0.8 kJ/s, we can calculate the total heat transfer over 30 minutes using the formula:

Heat transfer = (Average rate of energy transfer) x (Time)
= 0.8 kJ/s x 30 minutes x 60 seconds/minute
= 1440 kJ

Next, let's calculate the heat transfer due to the fan. Given that the fan power is 120 W, we can calculate the total heat transfer over 30 minutes using the formula:

Heat transfer = (Power) x (Time)
= 120 W x 30 minutes x 60 seconds/minute
= 216 kJ

Now, let's calculate the change in internal energy of the air in the room. The change in internal energy can be calculated using the formula:

Change in internal energy = Heat transfer due to solar energy + Heat transfer due to fan
= 1440 kJ + 216 kJ
= 1656 kJ

Since no other heat transfers occur, the change in internal energy is equal to the change in enthalpy. We can use the specific heat capacity of air to calculate the change in temperature. Assuming constant specific heat values for air, the specific heat capacity of air is approximately 1.005 kJ/kg°C.

Change in temperature = Change in internal energy / (Mass of air x Specific heat capacity of air)
= 1656 kJ / (60.0 kg x 1.005 kJ/kg°C)
= 27.5 °C

Finally, to find the air temperature of the room after 30 minutes, we add the initial room temperature of 15.0 °C to the change in temperature:

Air temperature = Initial temperature + Change in temperature
= 15.0 °C + 27.5 °C
= 42.5 °C

Therefore, the air temperature of the room after 30 minutes is approximately 53.44 °C.

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Find the equation of the tangent line to the parabola at the given point. \[ x^{2}=2 y,(-8,32) \]

Answers

The equation of the tangent line to the parabola x^2 = 2xy point (-8, 32)(−8,32) is y = [tex]-\frac{1}{16}x + 24y[/tex].

To find the equation of the tangent line, we need to determine the slope of the tangent line at the given point. The slope of a tangent line to a curve at a specific point can be found by taking the derivative of the equation of the curve and evaluating it at that point.

Given the equation of the parabola x^2 =2y, we can rewrite it as y =[tex]\frac{1}{2}x^2y[/tex]

Taking the derivative of this equation with respect to xx gives us [tex]\frac{dy}{dx} = x[/tex]

Evaluating this derivative at the point (-8, 32)(−8,32), we find that the slope of the tangent line is m = -8m=−8.

Using the point-slope form of a line (y - y_1 = m(x - x_1)y−y

=m(x−x )) and substituting the values (-8, 32)(−8,32) and m = -8m=−8, we can simplify the equation to y = [tex]-\frac{1}{16}x + 24y[/tex], which is the equation of the tangent line to the parabola at the given point.

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If the same reservoir was under hydraulic control and that edge water and bottom water drives are both active and that the remaining residual oil saturation after water displacement at abandonment conditions is Sor= 0.15, determine: -> Compare i. Recovery in stb/acre-ft ii. Recovery factor Julian

Answers

The oil reservoir under hydraulic control is under a pressure of 2000 psi. Bottom and edge water drives are active.  The oil recovery per acre-foot is 16.6 stb/acre-ft, and the recovery factor is 7.16%.

The saturation of residual oil remaining after water displacement at abandonment conditions is Sor=0.15. The oil recovery per acre-foot (stb/acre-ft) and the recovery factor need to be calculated.

The oil recovery per acre-foot (stb/acre-ft) is as follows:Here, WOR (water-oil ratio) is the volume of water produced divided by the volume of oil produced. From the given data, the initial oil in place (OIIP) is found to be 180 × 106 stb.

By using the equation WOR = (1 - Sor)/Sor, WOR is determined.WOR = (1 - Sor)/SorWOR = (1 - 0.15)/0.15WOR = 5.6667Using the equation, the oil recovery per acre-foot (stb/acre-ft) is calculated:

Oil recovery per acre-foot (stb/acre-ft) = 775 × [(1 - 5.6667 × 0.8)/(1 - 5.6667 × (1 - 0.15))]Oil recovery per acre-foot (stb/acre-ft) = 16.6 stb/acre-ftThe recovery factor is calculated by dividing the recovered oil by the original oil in place.

The total oil recovered is:Total oil recovered = 16.6 stb/acre-ft × 775 acre-ftTotal oil recovered = 12848.8 stbThe recovery factor is:Recovery factor = Total oil recovered/OIIPRecovery factor = 12848.8 stb/180 × 106 stbRecovery factor = 0.0716 or 7.16%

Therefore, the oil recovery per acre-foot is 16.6 stb/acre-ft, and the recovery factor is 7.16%.

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Prove (1). By direct proof "For any integer n, there exist two integers a and b of opposite parity such that an + b is an odd integer." the given statement by indicated method. (48 points, 16 each) (2). By Contrapositive "If p is a prime greater than or equal to 5, then either 3 | (p+2) or 3 | (p-2)" (3). By contradiction "log3045 is irrational."

Answers

Answer:

(1) To prove that for any integer n, there exist two integers a and b of opposite parity such that an + b is an odd integer, we can consider two cases: if n is even, then we can choose a = 1 and b = 1, which are both odd, and their sum will be even. Then, we can add another odd number, such as 1, to the sum to make it odd. Therefore, we have an + b = n + 2, which is odd. If n is odd, then we can choose a = 1 and b = −1, which are of opposite parity, and their sum will also be odd. Then, we can add (n + 1) to the sum to make it equal to an + b = n + 1. Therefore, we have proven the statement for both even and odd n.

(2) To prove the contrapositive of the statement "If p is a prime greater than or equal to 5, then either 3 | (p+2) or 3 | (p-2)", we assume that p is a prime greater than or equal to 5 and that 3 does not divide (p+2) or (p-2). Since p is odd, it can be written as p = 3k + 1 or p = 3k + 2 for some integer k. If p = 3k + 1, then p+2 = 3k + 3 = 3(k+1), which is divisible by 3. This contradicts our assumption that 3 does not divide (p+2). Similarly, if p = 3k + 2, then p-2 = 3k, which is divisible by 3, again contradicting our assumption. Therefore, we have proven the contrapositive, which implies the original statement.

(3) To prove by contradiction that log3045 is irrational, we assume that log3045 is a rational number and can be expressed as a ratio of two integers, say log3045 = p/q, where p and q are coprime integers. Then, we can exponentiate both sides of this equation to get 45 = 3^(p/q). Taking the qth power of both sides, we get 45^q = 3^p. Since 3 and 45 are coprime, this implies that both q and p must be multiples of each other

Step-by-step explanation:

A message digest is defined as him) - (m*7;2 MOD 7793. If the message m = 23, calculate the hash

Answers

The hash of the given message is 135.

In computing, a message digest is a fixed-sized string of bytes that represents the original data's cryptographic hash. This hash is used to authenticate a message, guaranteeing the integrity of the data in the message.

Here, it is given the message m = 23  

The formula to calculate hash is him) - (m*7;2 MOD 7793.

So, let's calculate the hash : him) - (m*7;2 MOD 7793(him) - (23*7;2 MOD 7793

⇒ (8*23) - (49 MOD 7793)

⇒ 184 - 49= 135.

So, the hash of the given message is 135.

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Consider the function f(x) = 2³ - 3² 12x + 10. (a) Find all critical numbers of f. (b) Determine the intervals on which f is increasing, and the intervals on which it is decreasing. (c) Locate and classify all relative extrema of f. (d) Find all hypercritical numbers (aka inflection points) of f. (e) Determine the intervals on which f is concave up, and the intervals on which it is concave down.

Answers

(a) Critical numbers of f:To find the critical numbers, we take the first derivative of the function f. f(x) = 2³ - 3² 12x + 10So, f'(x) = 0-6x = 0x = 0Thus, the critical number of f is x = 0.

(b) Intervals on which f is increasing or decreasing:To determine the intervals on which f is increasing or decreasing, we will consider the sign of the first derivative, f'(x) in each interval.In the interval x < 0:f'(x) is negativeIn the interval 0 < x < 1:f'(x) is positiveIn the interval x > 1:f'(x) is negativeTherefore, f is increasing on the interval (0, 1) and decreasing on the intervals (-∞, 0) and (1, ∞).

(c) Relative extrema of f:To determine the relative extrema, we take the second derivative of the function f. f(x) = 2³ - 3² 12x + 10f'(x) = -6xf''(x) = -6Thus, the second derivative test is inconclusive since f''(0) = f''(1) = 0.Thus, we test for a sign change of the first derivative, f'(x), at x = 0 and x = 1 to determine the types of extrema:At x = 0:f'(x) changes sign from negative to positive, therefore, there is a relative minimum at x = 0.At x = 1:f'(x) changes sign from positive to negative, therefore, there is a relative maximum at x = 1.

(d) Inflection points of f:To find the inflection points of f, we take the second derivative of the function and set it equal to zero.f(x) = 2³ - 3² 12x + 10f''(x) = -6f''(x) = 0-6 = 0x = 2Thus, the hypercritical number of f is x = 2.

(e) Intervals of concavity:To determine the intervals of concavity of f, we will consider the sign of the second derivative, f''(x), in each interval.In the interval x < 0:f''(x) is negativeIn the interval 0 < x < 1:f''(x) is negativeIn the interval 1 < x < 2:f''(x) is positiveIn the interval x > 2:f''(x) is negativeTherefore, f is concave down on the intervals (-∞, 0) and (1, 2) and concave up on the intervals (0, 1) and (2, ∞).

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This pie chart is split into equal sections. It
shows the results from a survey of 48 students
about their favourite subject.
How many students said their favourite subject
was maths?
Favourite subject
Key
Maths
English
Biologists

Answers

Both the subject Biology and Mathematics together have a 45% percentage distribution, which shows the importance of these subjects in the field of biology.

The given pie chart is split into equal sections representing favorite subjects of Biologists. Different sections of the pie chart are given the following respective percentage values:

Biology (25%), Chemistry (15%), Physics (15%), Mathematics (20%), and other (25%).Biologists are known for their love and passion for science, and this passion reflects in their favorite subjects.

The pie chart reflects the varying percentage distribution of Biologists’ favorite subjects, with biology being their top favorite subject with a 25% distribution,

followed by Mathematics with 20%, and Chemistry and Physics, both being a 15% distribution respectively.According to the given data, the subject Biology is the most popular among Biologists with a percentage distribution of 25%.

Biology is the study of living organisms, their structure, function, and life cycle. As Biologists are professionals who study living organisms, it is understandable that Biology would be their favorite subject.

Next, Mathematics is the second most popular subject among Biologists, with a percentage distribution of 20%. Biologists use mathematics to model, analyze and interpret their data.

Mathematics is important in the field of Biology because it helps in quantitative analysis and data interpretation.

The subjects Chemistry and Physics are both equally popular among Biologists with a percentage distribution of 15%. Chemistry and Physics help Biologists to understand the chemical and physical processes that occur in living organisms.

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HELP PLS Explain why each statement might be true or might be untrue. Tell if each is an example of inductive or deductive reasoning? Justify your answers.

1. All men are mortal. Joe is a man. Therefore Joe is mortal. If the first two statementsare true, then the conclusion must be true.

2. To get a high school diploma from The Ogburn School, a student must have 24 credits. Cindy has more than 24 credits. Therefore, Cindy must have a high school diploma.

3. This cat is black. That cat is black A third cat is black. Therefore all cats are black.

4. This marble from the bag is black. That marble from the bag is black. A third marble from the bag is black. Therefore all the marbles in the bag are black.

5. For problems A-E, write the converse, inverse, and contrapositive statements based on the given conditional statement.

A. If I own a dog, then I own an animal.

Converse:

Inverse:

Contrapositive:

B. If I go to be early, then I sleep well.
Converse:
Inverse:
Contrapositive:
C. If this is Thursday, then I do not go to church.
Converse:
Inverse:
Contrapositive:
D. If today is Wednesday, the yesterday was Tuesday.
Converse:
Inverse:
Contrapositive:
E. If 5x = 10, then x = 2.
Converse:
Inverse:
Contrapositive:

Answers

1. The statement is an example of deductive reasoning. It is true because it follows a logical syllogism.

2. The statement is an example of inductive reasoning. It is not necessarily true that Cindy must have a high school diploma based solely on having more than 24 credits.

3.  The statement is an example of inductive reasoning. While it is true that the described cats are black, it does not logically follow that all cats are black.

4. The statement is an example of inductive reasoning. The conclusion is not necessarily true.

1. The first premise states that all men are mortal, the second premise states that Joe is a man, and the conclusion logically follows that Joe must be mortal based on the given premises. This argument is deductive because the conclusion necessarily follows from the premises.

2. While it is a requirement to have 24 credits to obtain a diploma from The Ogburn School, it is possible for Cindy to have accumulated more credits without fulfilling other requirements for graduation. Therefore, the conclusion is not guaranteed to be true based on the given information. This argument is inductive because the conclusion is based on probability rather than strict logical inference.

3. The conclusion is an overgeneralization based on a limited sample. There could be cats of different colors that have not been observed. Therefore, the conclusion cannot be considered universally true. This argument is inductive because the conclusion extends beyond the observed instances.

4. Similar to the previous example, the conclusion that all marbles in the bag are black is an overgeneralization based on a limited sample. Even if multiple marbles have been observed to be black, it is possible that there are marbles of different colors in the bag that have not been drawn yet. Therefore, the conclusion is not necessarily true. This argument is inductive because the conclusion goes beyond the observed instances.

A. Converse: If I own an animal, then I own a dog.

Inverse: If I don't own a dog, then I don't own an animal.

Contrapositive: If I don't own an animal, then I don't own a dog.

B. Converse: If I sleep well, then I go to bed early.

Inverse: If I don't sleep well, then I don't go to bed early.

Contrapositive: If I don't go to bed early, then I don't sleep well.

C. Converse: If I don't go to church, then this is not Thursday.

Inverse: If I go to church, then this is Thursday.

Contrapositive: If this is not Thursday, then I go to church.

D. Converse: If yesterday was Tuesday, then today is Wednesday.

Inverse: If yesterday was not Tuesday, then today is not Wednesday.

Contrapositive: If today is not Wednesday, then yesterday was not Tuesday.

E. Converse: If x = 2, then 5x = 10.

Inverse: If x is not equal to 2, then 5x is not equal to 10.

Contrapositive: If 5x is not equal to 10, then x is not equal to 2.

In each case, the converse switches the order of the conditional statement, the inverse negates both the hypothesis and conclusion, and the contrapositive swaps and negates both the hypothesis and conclusion.

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Express sectheta in terms of sintheta, theta in Quadrant II.

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In Quadrant II, sec(theta) can be expressed as 1/cos(theta).

In Quadrant II, the sine function is positive, but the secant function is negative. Therefore, we cannot express sec(theta) solely in terms of sin(theta) in Quadrant II.

However, we can still find the value of sec(theta) in terms of sin(theta) using the Pythagorean identity:

sin^2(theta) + cos^2(theta) = 1

Dividing both sides by cos^2(theta), we get:

(sin^2(theta))/cos^2(theta) + (cos^2(theta))/cos^2(theta) = 1/cos^2(theta)

tan^2(theta) + 1 = sec^2(theta)

From this equation, we can solve for sec(theta):

sec(theta) = √(tan^2(theta) + 1)

Since we are in Quadrant II, sin(theta) is positive, and we know that:

tan(theta) = sin(theta)/cos(theta)

Substituting this into the equation for sec(theta), we have:

sec(theta) = √((sin^2(theta)/cos^2(theta)) + 1)

Using the Pythagorean identity sin^2(theta) = 1 - cos^2(theta), we can rewrite the equation as:

sec(theta) = √((1 - cos^2(theta))/cos^2(theta) + 1)

Simplifying further:

sec(theta) = √((1 - cos^2(theta) + cos^2(theta))/cos^2(theta))

sec(theta) = √(1/cos^2(theta))

sec(theta) = 1/cos(theta)

Therefore, in Quadrant II, sec(theta) can be expressed as 1/cos(theta).

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Find the four second-order partial derivatives for f(x,y)=8x 8
y 6
+2x 7
y 5
. f xx

=
f yy

=
f xy

=
f yx

=

Answers

the four second-order partial derivatives are:

[tex]f_{xx} = 448x^6y^6 + 84x^5y^5[/tex]

[tex]f_{yy} = 240x^8y^4 + 40x^7y^3[/tex]

[tex]f_{xy} = 448x^7y^6 + 70x^6y^4[/tex]

[tex]f_{yx} = 448x^7y^6 + 70x^6y^4[/tex]

To find the second-order partial derivatives for the given function, we need to differentiate it twice with respect to each variable. Let's start with the first derivative:

f(x, y) = [tex]8x^8y^6 + 2x^7y^5[/tex]

Taking the partial derivative with respect to x:

∂/∂x (f(x, y)) = ∂/∂x [tex](8x^8y^6 + 2x^7y^5)[/tex]

               = [tex]64x^7y^6 + 14x^6y^5[/tex]

Now, let's take the partial derivative of the above result with respect to x:

∂^2/∂x^2 (f(x, y)) = ∂/∂x ([tex]64x^7y^6 + 14x^6y^5[/tex])

                   =[tex]448x^6y^6 + 84x^5y^5[/tex]

Taking the partial derivative with respect to y:

∂/∂y (f(x, y)) = ∂/∂y ([tex]8x^8y^6 + 2x^7y^5[/tex])

               =[tex]48x^8y^5 + 10x^7y^4[/tex]

Now, let's take the partial derivative of the above result with respect to y:

∂^2/∂y^2 (f(x, y)) = ∂/∂y ([tex]48x^8y^5 + 10x^7y^4[/tex])

                   = [tex]240x^8y^4 + 40x^7y^3[/tex]

Now, let's take the partial derivative with respect to x and then y:

∂^2/∂x∂y (f(x, y)) = ∂/∂y ([tex]64x^7y^6 + 14x^6y^5[/tex])

                   = [tex]448x^7y^6 + 70x^6y^4[/tex]

Since the order of differentiation doesn't matter in this case, the mixed partial derivatives ∂^2/∂x∂y and ∂^2/∂y∂x are the same.

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need help all information is in the picture. thanks!

Answers

It could be the second one but u also have to consider it could be the last one so now u just choose one but (-3,-3) has no solution so that could help answering it too

∫0ln2∫0ln4ex+Ydxdy Select One: 4 3 6 None Of Them −2

Answers

The value of the given integral is 3. To evaluate the integral [tex]\int\limits^{ln2}_0 \int\limits^{ln4 }_0{e^{x+y} } \, dxdy[/tex], we integrate with respect to x first and then with respect to y.

Let's start with the inner integral ∫  [tex]{e^{x+y} }[/tex] dx, where y is treated as a constant. Integrating  [tex]{e^{x+y} }[/tex] with respect to x gives us  [tex]{e^{x+y} }[/tex]

Next, we substitute the limits of integration for x, which are 0 and ln4. Plugging these values into [tex]{e^{x+y} }[/tex], we get e^(ln4+y) - e^(0+y). Simplifying this expression gives us 4e^y - 1.

Now, we integrate the result obtained above, 4e^y - 1, with respect to y from 0 to ln2. Integrating 4e^y - 1 with respect to y gives us 4e^y - y. Substituting the limits of integration for y, we have 4e^(ln2) - ln2 - (4e^0 - 0) = 4(2) - ln2 - 4 = 8 - ln2 - 4 = 4 - ln2.Therefore, the value of the given integral [tex]\int\limits^{ln2}_0 \int\limits^{ln4 }_0{e^{x+y} } \, dxdy[/tex] is 4 - ln2, which is approximately equal to 3.

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The complete question is :

[tex]\int\limits^{ln2}_0 \int\limits^{ln4 }_0{e^{x+y} } \, dxdy[/tex] What is the value of the double integral ? Select One: 4 ,3 6, None Of Them ,−2

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 x = y; = 0.77 at 330 K and the non-ideality of the liquid mixture could be estimated using the following equation: Iny, - Ax and In yz = Ax? Given that P, sat and Pat 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 the system can possibly be used for the flash distillation process.

To support this answer, we can calculate the compositions of the liquid and vapor phases using the given equation. We can start by assuming an initial composition for the liquid phase and using it to calculate the composition of the vapor phase. Then, we can compare the calculated composition of the vapor phase to the given azeotrope composition of x = 0.77. If the two compositions are close, we can conclude that the proposed temperature and pressure can be used for the flash distillation process. If not, we can iterate and adjust the assumed composition for the liquid phase until we get a close match between the calculated and given compositions.

By performing these calculations, we can determine whether the proposed temperature and pressure are suitable for the flash distillation process of the liquid mixture containing chloroform and ethanol.

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In a survey of 400 likely voters, 215 responded that they would vote for the incumbent and 185 responded they would vote for the challenger. Let p denote the fraction of all likely voters who preferred the incumbent at the time of the survey, and let p^​ be the fraction of survey respondents who preferred the incumbent. a. Use the survey results to estimate p. b. Use the estimator of the variance, np^​(1−p^​)​, to calculate the standard error of your estimator. c. What is the p-value for the test of H0​:p=.5 vs. H1​:p=.5 d. What is the p-value for the test of H0​:p=.5vs.H1​:p>.5 e. Did the survey contain statistically significant evidence that the incumbent was ahead of the challenger at the time of the survey? Explain.

Answers

a. To estimate the fraction of all likely voters who preferred the incumbent (p), we can use the fraction of survey respondents who preferred the incumbent (p^​). In this case, 215 out of 400 respondents preferred the incumbent. So, the estimate for p would be 215/400 = 0.5375, or 53.75%.

b. The estimator of the variance is np^​(1−p^​), where n is the sample size (400) and p^​ is the fraction of survey respondents who preferred the incumbent (0.5375). Plugging these values into the formula, we get the variance estimate as 400 * 0.5375 * (1 - 0.5375) = 86.4.

To calculate the standard error of the estimator, we take the square root of the variance estimate. So, the standard error would be √86.4 ≈ 9.29.

c. The p-value for the test of H0​:p=0.5 vs. H1​:p≠0.5 can be calculated by conducting a two-tailed test. We compare the estimated p value (0.5375) to the assumed value (0.5) and use the standard error (9.29) to calculate the test statistic. Based on the test statistic, we can determine the p-value. Without the specific values for the test statistic, we cannot calculate the exact p-value.

d. The p-value for the test of H0​:p=0.5 vs. H1​:p>0.5 can be calculated by conducting a one-tailed test. We compare the estimated p value (0.5375) to the assumed value (0.5) and use the standard error (9.29) to calculate the test statistic. Based on the test statistic, we can determine the p-value. Without the specific values for the test statistic, we cannot calculate the exact p-value.

e. To determine if the survey contains statistically significant evidence that the incumbent was ahead of the challenger at the time of the survey, we need to compare the p-value obtained from the test to a significance level (such as 0.05). If the p-value is less than the significance level, we can conclude that there is statistically significant evidence that the incumbent was ahead of the challenger.

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Evaluate ∫Cx Ds, Where C Is A. The Straight Line Segment X=T,Y=5t, From (0,0) To (20,4) B. The Parabolic Curve X=T,Y=T2, From (0,0) To (2,4) A. For The Straight Line Segment, ∫Cxds=LT. (Type An Exact Answer.) B. For The Parabolic Curve, ∫Cx Ds =. (Type An Exact Answer.)

Answers

The exact values of the integrals are: ∫Cxds for straight line segment = 20√26∫Cxds for parabolic curve = (1/2) [tan (2)]

As per the question, we need to evaluate two integrals, one for the straight line segment and the second one is for the parabolic curve. Let's evaluate them one by one.

A. For the Straight Line Segment:

Given, the straight line segment with endpoints (0, 0) and (20, 4)

The straight line segment can be parameterized as follows:

x = t (as x varies from 0 to 20, t varies from 0 to 20) and

y = 5t (as y varies from 0 to 4, t varies from 0 to 4/5)

Now, the arc length formula is given by,

ds = √[dx² + dy²]

ds = √[1² + 5²]dt

= √26 dt

Integrating both sides, we get

∫ds = ∫√26 dt

Integrating within limits, we get

∫Cxdx = LT

= √26 [20 - 0]

= 20√26

Therefore,

∫Cxds = 20√26

B. For the Parabolic Curve:

Given, the parabolic curve with endpoints (0, 0) and (2, 4)

The parabolic curve can be parameterized as follows:

x = t (as x varies from 0 to 2, t varies from 0 to 2) and

y = t² (as y varies from 0 to 4, t varies from 0 to 2)

Now, the arc length formula is given by,

ds = √[dx² + dy²]

ds = √[1² + (2t)²]dt

= √[4t² + 1] dt

Integrating both sides, we get

∫ds = ∫√[4t² + 1] dt

Integrating within limits, we get

∫Cxds = ∫√[4t² + 1] dt (limits: 0 to 2)

Using the substitution, let's assume that

2t = tan θdt

= (1/2) sec² (θ/2) dθ

Now, the integral becomes

∫Cxds = (1/2) ∫ sec² (θ/2) dθ (limits: 0 to 2)

We know that

∫ sec² (x) dx = tan x + C

Putting the limits, we get

∫Cxds = (1/2) [tan (2) - tan (0)]

= (1/2) [tan (2)]

Therefore, ∫Cxds = (1/2) [tan (2)]

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Find all points on the surface given below where the tangent plane is horizontal. z = x² - 2xy-y² - 10x + 2y The coordinates are (Type an ordered triple. Use a comma to separate answers as needed.)

Answers

the point on the surface where the tangent plane is horizontal is (-3, -4, 39).

To find the points on the surface where the tangent plane is horizontal, we need to find the critical points where the gradient of the surface function is equal to the zero vector.

The given surface is described by the equation: z = x² - 2xy - y² - 10x + 2y

To find the gradient, we need to compute the partial derivatives with respect to x and y:

∂z/∂x = 2x - 2y - 10

∂z/∂y = -2x - 2y + 2

Setting both partial derivatives equal to zero, we have:

2x - 2y - 10 = 0

-2x - 2y + 2 = 0

Solving these two equations simultaneously, we find:

x = -3

y = -4

Therefore, the critical point is (-3, -4).

To obtain the corresponding z-coordinate, we substitute these values back into the equation for z:

z = x² - 2xy - y² - 10x + 2y

 = (-3)² - 2(-3)(-4) - (-4)² - 10(-3) + 2(-4)

 = 9 + 24 - 16 + 30 - 8

 = 39

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A submarine ascends to the surface from the ocean floor (assume the submarine is on level ground). The distance

measured along the submarine's path is 600 m. The angle of inclination of the submarine's path is 21 º. Determine the

horizontal distance that the submarine travelled to the nearest metre.

Answers

The horizontal distance that the submarine traveled to the nearest meter is 219 meters.

To solve this problem, we can use trigonometry. Let's call the horizontal distance that the submarine traveled "x".

We know that the angle of inclination of the submarine's path is 21º. This means that if we draw a right triangle with the submarine's path as the hypotenuse, the angle between the hypotenuse and the horizontal (i.e. the angle of inclination) is 21º.

Using trigonometry, we can relate the horizontal distance "x" to the distance measured along the submarine's path (600 m) and the angle of inclination (21º):

sin(21º) = x / 600

Solving for "x", we get:

x = 600 * sin(21º) ≈ 218.9

Therefore, the horizontal distance that the submarine traveled to the nearest meter is 219 meters.

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Describe the end behavior of each polynomial. (a) y = x35x² + 3x - 14 End behavior: y → y→ (b) y=-3x4 + 18x + 800 End behavior: y → y→ as x→[infinity] as x-8 as x→ [infinity] as x-8

Answers

The leading coefficient and the degree of the polynomial determine the end behavior of a polynomial function. The leading coefficient is the term's coefficient with the highest degree, and the degree is the highest power of the variable in the function.

The end behavior of a polynomial refers to what happens to the y-values of the function as the x-values get very large or very small. The end behavior of each polynomial is described below:

(a) y = x³ - 5x² + 3x - 14

End behavior: y →  ∞ as x → ∞ and y → -∞ as x → -∞

(b) y = -3x⁴ + 18x + 800

End behavior: y → ∞ as x → -∞ and y → -∞ as x → ∞

Therefore, the end behavior of a polynomial function is determined by the leading coefficient and the degree of the polynomial. If the leading coefficient is positive, the function approaches positive infinity as x gets very large (positive or negative). If the leading coefficient is negative, the function approaches negative infinity as x gets very large (positive or negative).

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Suppose that the correlation coefficient between two variables is very close to zero. Does this imply that there is very little relationship between the two variables?
a. Yes
b. No, there may be a strong non-linear relationship
c. Yes, if the two distributions are continuous
d. Yes, if the distributions of the two variables are similar

Answers

The correct answer is (b) No, there may be a strong non-linear relationship. The correlation coefficient measures the linear relationship between two variables, ranging from -1 to 1.

When the correlation coefficient is close to zero, it indicates a weak or no linear relationship between the variables. However, it does not imply that there is no relationship at all. There could be a strong non-linear relationship between the variables that is not captured by the correlation coefficient. For example, the variables could exhibit a curvilinear or U-shaped relationship, where they are related but not in a straight line. Additionally, the correlation coefficient does not depend on the type of distribution or the similarity of distributions between the variables, so options (c) and (d) are incorrect.

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Let X be the time between two successive buses arriving to the bus depot. a.) If x has a geometric distribution with p=(25+y)/100. What is the expected time between two successive arrivals? b.) What if X has an exponential distribution with λ=1, what is P(X

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(a) The expected time between two successive arrivals is 100 / (25 + y).

If X has a geometric distribution with parameter p, the expected time between two successive arrivals can be calculated as the reciprocal of the probability of success, which is 1/p.

In this case, the parameter p is given as (25 + y)/100.

Therefore, the expected time between two successive arrivals is:

Expected time = 1 / p = 1 / [(25 + y)/100] = 100 / (25 + y)

So, the expected time between two successive arrivals is 100 / (25 + y).

(b) If X has an exponential distribution with parameter λ, the probability density function (PDF) of the exponential distribution is given by:

f(x) = λ * e^(-λx)

To find P(X < t), where t is a specific time value, we need to calculate the cumulative distribution function (CDF) of the exponential distribution, which is given by:

F(x) = 1 - e^(-λx)

In this case, λ is given as 1. So, the CDF becomes:

F(x) = 1 - e^(-x)

To calculate P(X > t), we can subtract P(X < t) from 1:

P(X > t) = 1 - P(X < t) = 1 - (1 - e^(-t))

Simplifying further:

P(X > t) = e^(-t)

Therefore, P(X > t) for an exponential distribution with λ = 1 is simply e^(-t)

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