Convert this rational number to its decimal form and round to the nearest thousandth. 6/7


HURRY

Answers

Answer 1

Answer:0.143

Step-by-step explanation:

Step-by-step explanation:

1) convert to decimal form: 0.142857

2) rounding to nearest thousandth (3rd decimal place)

3) number is higher than 5 so it rounds up to 0.143Answer:

0.143

Step-by-step explanation:

1) convert to decimal form: 0.142857

2) rounding to nearest thousandth (3rd decimal place)

3) number is higher than 5 so it rounds up to 0.143


Related Questions

Given x (t) = tu (t). Find the Fourier transform of d² dt² O Fourier transform does not exist. O - O 0-1/1/2 O 3 42 3 4 x (3t). dy(t) dt Given the LCCDE + 2y(t) = x(t) + response, h(t). OS(t)-e-2tu(t) O-8(t) + e-2tu(t) O 8(t) + e-2tu(t) O 8(t) - e²tu(t) 2 dx (t) dt 1 find the impulse

Answers

The correct answer is  the Fourier transform of d²x(t)/dt² is 0.So, the correct answer is:0

To find the Fourier transform of the given function x(t) = tu(t), we can apply the properties and formulas of Fourier transforms.

The Fourier transform pair for the time-domain derivative is:

Fourier transform of dx(t)/dt = jωX(ω), where X(ω) is the Fourier transform of x(t).

Using this property, we can find the Fourier transform of the second derivative:

Fourier transform of d²x(t)/dt² = (jω)²X(ω) = -ω²X(ω)

In this case, x(t) = tu(t), so we have:

d²x(t)/dt² = d²(tu(t))/dt²

Differentiating the unit step function, we have:

d²(tu(t))/dt² = d(t)/dt = 0

Therefore, the Fourier transform of d²x(t)/dt² is 0.

So, the correct answer is:0

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Evaluate using your calculator, giving at least 3 decimal places: log(370) = Question Help: Video Message instructor Calculator Submit Question Solve for : 2 = 29 H= You may enter the exact value or round to 4 decimal places. Question Help: Video Message instructor Calculator Cubmit Question

Answers

The value of log(370) is approximately 2.568.

To evaluate log(370) using a calculator, follow these steps:

Turn on your calculator and locate the "log" or "logarithm" function. This function calculates the logarithm of a given number.

Enter the number 370 into the calculator.

Press the "log" or "logarithm" button on your calculator. This will compute the logarithm of the entered number.

Read the output displayed on your calculator. The result will be the logarithm of 370.

Based on these steps, evaluating log(370) yields an approximate value of 2.568 when rounded to at least 3 decimal places.

Therefore, the logarithm of 370 is approximately 2.568. This means that 10 raised to the power of 2.568 is approximately equal to 370. The logarithm function allows us to determine the exponent to which we need to raise 10 to obtain a given number.

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An approximate solution to x³ + 7x = 1 can be found using this iterative formula: Xn+1 3 1- x n 7 Use this formula to work out an approximate solution to the equation, starting with a₁ = 0. Give your answer to 3 d.p.​

Answers

The given iterative formula does not converge to a solution for the equation x³ + 7x = 1.

To find an approximate solution to the equation x³ + 7x = 1 using the given iterative formula, we can start with a value of a₁ = 0 and iteratively apply the formula to obtain a sequence of values. Here's how the calculation proceeds:

a₂ = (a₁³ + 7a₁ - 1) = (0³ + 7(0) - 1) = -1

a₃ = (a₂³ + 7a₂ - 1) = (-1³ + 7(-1) - 1) = -9

a₄ = (a₃³ + 7a₃ - 1) = (-9³ + 7(-9) - 1) = -689

a₅ = (a₄³ + 7a₄ - 1) = (-689³ + 7(-689) - 1) = -326709136

...

As we continue the iterations, the values diverge further away from the desired solution. This suggests that the given iterative formula does not converge to a solution for the equation x³ + 7x = 1.

Therefore, it is not possible to obtain a valid approximate solution using this particular formula and initial value.

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Consider the system of linear equations, x+3y+2z
y+
2y+(a 2
−2)z
​ =3
=2
=a+2
​ Represent the above system as an augmented matrix and use Maple Learn to find row equivalent matrix. Then, determine the value(s) of m such that the system is a) has a unique solution. b) has infinitely many solutions.

Answers

To represent the system of linear equations as an augmented matrix, 0

we arrange the coefficients of the variables on the left side of the vertical line and the constants on the right side.

The augmented matrix for the given system is:

c sharp

[1   3    2 | 3]

[0   2    a | 2]

[0   0   -2 | a+2]

To find the row equivalent matrix using Maple,

Let's calculate it:

Maple

A := Matrix([[1, 3, 2, 3], [0, 2, a, 2], [0, 0, -2, a+2]]);

B := (A);

B;

The row equivalent matrix B will be displayed.

Now, let's analyze the different cases to determine the value(s) of a (or m) for which the system has a unique solution or infinitely many solutions.

a) Unique Solution:

For the system to have a unique solution, there should be no free variables, i.e., every column of the row equivalent matrix should contain a pivot (leading entry). In this case, it means that every column except the last one should have a pivot.

We can check for the presence of pivots by examining the row equivalent matrix B. If every column except the last one has a pivot, then the system has a unique solution.

b) Infinitely Many Solutions:

If there is at least one free variable (a column without a pivot) in the row equivalent matrix, then the system has infinitely many solutions.

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Let Y1,…,Yn∼2aPoisson(λ); i.e., they are n random variables that are independent and identically distributed from a Poisson distribution with mean λ. Find the method of moments estimator of λ

Answers

the method of moments estimator of λ is simply the sample mean,  [tex]\bar{Y}[/tex], of the observed Poisson random variables Y₁, Y₂, ..., Yₙ.

To find the method of moments estimator of λ for the given set of random variables Y₁, Y₂, ..., Yₙ, we start by calculating the moments of the Poisson distribution.

The mean (μ) and variance (σ²) of a Poisson distribution with parameter λ are both equal to λ.

The first moment (μ₁) can be obtained by taking the expected value of the random variable Y:

μ₁ = E(Y) = λ

Setting the first sample moment equal to the first population moment, we have:

μ₁ = (1/n) * ∑Yᵢ

Now, since Y₁, Y₂, ..., Yₙ are independent and identically distributed, their means are equal. Therefore, we can rewrite the equation as:

μ₁ = (1/n) * n * [tex]\bar{Y}[/tex]

where  [tex]\bar{Y}[/tex] is the sample mean of the observed values Y₁, Y₂, ..., Yₙ.

Simplifying the equation, we get:

λ =  [tex]\bar{Y}[/tex]

Thus, the method of moments estimator of λ is simply the sample mean,  [tex]\bar{Y}[/tex], of the observed Poisson random variables Y₁, Y₂, ..., Yₙ.

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A square-based shipping crate is designed to have a volume of 18 ft^3.
The material for the base costs twice and that for the top half
as much (per sqaure foot) as the material used for the sides. What are the
dimensions of the crate that minimize the cost of materials?

Answers

Given: Volume of a square-based shipping crate is 18 ft³, and the material for the base costs twice and that for the top half as much (per square foot) as the material used for the sides.To find: What are the dimensions of the crate that minimize the cost of materials?

Let the side of the square base be x and height of the crate be h.Volume of square-based shipping crate = 18 ft³Volume of square-based shipping crate = side² x height18 = x²h ------ equation (1)Surface area of square-based shipping crate = Area of base + Area of top + Area of four sides= x² + x² + 4(xh) ------- equation (2)Let's assume the material for the sides costs $1 per square foot and the material for the base is $2 per square foot then the material for the top half is $4.Surface area in terms of x and h = 2x² + 4xhTotal cost of materials = 2x² + 4xh + 2(2x²) [Material for base is $2 per sq. ft]Total cost of materials = 6x² + 4xh ------ equation (3)We know volume, so we can substitute this value of h in equation (1) and we will get h in terms of x.h = 18/x²

Substituting the values of h from equation (1) and equation (2) in equation (3)Total cost of materials = 6x² + 4x(18/x²)Total cost of materials = 6x² + 72/x ------ equation (4)To minimize the cost of materials, we need to find the derivative of equation (4) with respect to x, and equate it to zero.d(Total cost of materials)/dx = 12x - 72/x² = 0x³ = 6Therefore, x = 2 ftDimensions of crate are 2 ft x 2 ft x 4.5 ft (from equation 1)

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which of the following statement is true? group of answer choices method of false position always converges to the root faster than the bisection method. method of false position always converges to the rook. both false position and secant methods are in the open method category. secant and newton's methods both require the actual derivative in the iterative process.

Answers

The statement that is true among the given options is that both false position and secant methods are in the open method category.

The methods mentioned in the options are numerical methods used for finding roots of equations. Let's evaluate each statement to determine which one is true:

1. Method of false position always converges to the root faster than the bisection method: This statement is not true. The convergence rate of the method of false position and the bisection method depends on the specific equation being solved. In some cases, the false position method may converge faster, while in others, the bisection method may converge faster. The convergence rate can vary depending on the behavior of the function and the initial interval.

2. Method of false position always converges to the root: This statement is not true. The method of false position may not always converge to the root. There can be cases where the method fails to converge, such as when the function is highly nonlinear or has multiple roots within the initial interval.

3. Both false position and secant methods are in the open method category: This statement is true. The false position method and the secant method are both categorized as open methods because they do not require a bracketed interval to start the iteration. They can be applied with a single initial guess and iteratively approach the root.

4. Secant and Newton's methods both require the actual derivative in the iterative process: This statement is not true. While Newton's method requires the derivative of the function, the secant method approximates the derivative using two function evaluations without explicitly requiring the actual derivative.

Based on the explanations provided, the statement that is true is that both false position and secant methods are in the open method category.

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The probability distribution function of a discrete variable X is: = f(x) = {1/7kx, x = 3, 4, 5, 6
{0, Otherwise where k is a constant. a) Find the value of k. b) Construct the probability distribution table. c) Calculate the mean and variance of X. d) Find P(1

Answers

Given that the probability distribution function of a discrete variable X is as follows:f(x) = {1/7kx, x = 3, 4, 5, 6{0, Otherwise where k is a constant. a) Find the value of k.

Probability distribution function is given byf(x) = {1/7kx, x = 3, 4, 5, 6{0, OtherwiseAs we know that the sum of probabilities of all possible outcomes is equal to 1, thus the sum of the probability for x = 3, 4, 5, and 6 is 1.So,1/7k(3) + 1/7k(4) + 1/7k(5) + 1/7k(6) = 11/7kThus, we havek = 44.

b) Construct the probability distribution table. The probability distribution table is as follows:x 3 4 5 6 f(x) 1/11 4/11 5/11 6/11 c) Calculate the mean and variance of X. The mean of X is given byμ = ∑xf(x) = 3(1/11) + 4(4/11) + 5(5/11) + 6(6/11) = 94/11The variance of X is given byσ² = ∑(x-μ)²f(x) = [(3-94/11)²(1/11)] + [(4-94/11)²(4/11)] + [(5-94/11)²(5/11)] + [(6-94/11)²(6/11)] = 1972/121d) Find P(1

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Suppose X1Xn is a sample of successes and failures from a Bernoulli population with probability of success p. Let Ex=288 with n=415. Then a 80% confidence interval for p is: a) .6940 ± .0434 Ob) .694

Answers

The 80% confidence interval for p is found to be (0.654, 0.734).

To construct a confidence interval for the probability of success (p) in a Bernoulli population, we can use the formula for the confidence interval based on the normal approximation,

CI = sample proportion ± z-value * standard error

Next, we find the critical value (z) corresponding to the desired confidence level of 80%. Since the confidence interval is two-sided, we need to find the z-value that leaves 10% of the standard normal distribution:

z ≈ 1.282 (from z-table or calculator)

Finally, we can substitute the values into the confidence interval formula,

CI = 0.694 ± 1.282 *√((0.694 * (1 - 0.694)) / 415)

Calculating the confidence interval,

CI ≈ (0.654, 0.734)

Therefore, the 80% confidence interval for the probability of success (p) is approximately (0.654, 0.734).

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Complete question - Suppose X₁......Xₙ is a sample of successes and failures from a Bernoulli population with probability of success p. Let ∑x=288 with n=415. Then a 80% confidence interval for p is:

Define the norm in R 2
by ∥(x,y)∥=∣x∣+∣y∣( the 1 -norm). Let f:R 2
→R 2
be given by f(x,y)=( f 1
​ (x,y)
f 2
​ (x,y)
​ ):=( 2xy
4x 2
+y 2
​ ) Let Q={(x,y):∣x∣≤1,∣y∣≤2}. Show that f satisfies the Lipschitz condition on Q, i.e., there is a constant L>0 such that for any (x 1
​ ,y )
​ ,(x 2
​ ,y 2
​ )∈Q, ∣f 1
​ (x 1
​ ,y 1
​ )−f 1
​ (x 2
​ ,y 2
​ )∣+∣f 2
​ (x 1
​ ,y 1
​ )−f 2
​ (x 2
​ ,y 2
​ )∣≤L(∣x 1
​ ∣−x 2
​ ∣+∣y 1
​ −y 2
​ ∣) Also find an explicit Lipschitz constant L.

Answers

The function f: R² -> R² given by f(x, y) = (2xy, 4x² + y²) satisfies the Lipschitz condition on the set Q = {(x, y): |x| ≤ 1, |y| ≤ 2} with a Lipschitz constant L = 16.

To show that f satisfies the Lipschitz condition, we need to find a constant L such that for any two points (x₁, y₁) and (x₂, y₂) in Q, the difference between the function values of f at these points is bounded by L times the difference in the corresponding coordinates.

The difference in the function values:

|f₁(x₁, y₁) - f₁(x₂, y₂)| + |f₂(x₁, y₁) - f₂(x₂, y₂)| = |2x₁y₁ - 2x₂y₂| + |4x₁² + y₁² - 4x₂² - y₂²|

The properties of absolute values, simplify this expression:

|2x₁y₁ - 2x₂y₂| + |4x₁² + y₁² - 4x₂² - y₂²| ≤ 2|x₁ - x₂||y₁| + |4x₁² - 4x₂²| + |y₁² - y₂²|

The ranges of x and y in Q: |x| ≤ 1 and |y| ≤ 2. Using these bounds, we can further simplify the expression:

2|x₁ - x₂||y₁| + |4x₁² - 4x₂²| + |y₁² - y₂²| ≤ 2|x₁ - x₂|2 + 4|x₁ - x₂| + 4|y₁ - y₂|

Choose L = 16 as a Lipschitz constant that bounds the expression above. Thus, for any two points (x₁, y₁) and (x₂, y₂) in Q, we have:

|f₁(x₁, y₁) - f₁(x₂, y₂)| + |f₂(x₁, y₁) - f₂(x₂, y₂)| ≤ L(|x₁ - x₂| + |y₁ - y₂|)

Therefore, f satisfies the Lipschitz condition on Q with L = 16.

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HURRY PLEASEEEEE
Given the following table with selected values of the functions f (x) and g(x), determine f (g(2)) − g(f (−1)).


x −5 −4 −1 2 4 7
f (x) 21 17 −1 −7 −9 −27
g(x) −10 −8 −2 4 8 14

A. −7
B. −5
C. −2
D. 1

Answers

The values of the functions f (x) and g(x), determine f (g(2)) − g(f (−1)) is Option A, -7.

To determine f(g(2)) - g(f(-1)), we need to substitute the values of g(2) and f(-1) into the respective functions.

First, let's find g(2):

Looking at the table, when x = 2, g(x) = 4. Therefore, g(2) = 4.

Next, let's find f(-1):

When x = -1, f(x) = -1. Therefore, f(-1) = -1.

Now we can substitute these values into the expression f(g(2)) - g(f(-1)):

f(g(2)) - g(f(-1)) = f(4) - g(-1).

To find f(4), we refer to the table and see that when x = 4, f(x) = -9. Therefore, f(4) = -9.

Similarly, to find g(-1), we refer to the table and see that when x = -1, g(x) = -2. Therefore, g(-1) = -2.

Now we can substitute the values and simplify the expression:

f(g(2)) - g(f(-1)) = f(4) - g(-1) = -9 - (-2) = -9 + 2 = -7.

Therefore, the value of f(g(2)) - g(f(-1)) is -7.

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Let T: R² R² be the linear transformation that first rotates vectors clockwise by 225 degrees, and then reflects the resulting vectors about the line y = x. Part 1 (3 points). Briefly describe a met

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Let T: R² R² be the linear transformation that first rotates vectors clockwise by 225 degrees, and then reflects the resulting vectors about the line y = x. Part 1 (3 points). Briefly describe a method for computing the matrix A of the linear transformation T.

We know that T is the linear transformation that first rotates vectors clockwise by 225 degrees, and then reflects the resulting vectors about the line y = x. First, we need to write the matrix R for rotation by 225 degrees. This matrix is[tex]$$R=\begin{pmatrix}\cos 225^{\circ}&-\sin 225^{\circ}\\\sin 225^{\circ}&\cos 225^{\circ}\end{pmatrix}.[/tex]

$$This can be simplified using the fact that[tex]$$\cos 225^{\circ}=-\sin 45^{\circ}$$and $$\sin 225^{\circ}=-\cos 45^{\circ}.[/tex]

$$Thus we have$$R=\begin{pmatrix}-\frac{1}{\sqrt{2}}&\frac{1}{\sqrt{2}}\\-\frac{1}{\sqrt{2}}&-\frac{1}{\sqrt{2}}\end{pmatrix}.$$Next, we need to write the matrix S for reflection about the line y

= x. This matrix is$$S

=\begin{pmatrix}0&1\\1&0\end{pmatrix}.$$Now we can write the matrix A for the linear transformation T as$$A

=SR

=\begin{pmatrix}0&1\\1&0\end{pmatrix}\begin{pmatrix}-\frac{1}{\sqrt{2}}&\frac{1}{\sqrt{2}}\\-\frac{1}{\sqrt{2}}&-\frac{1}{\sqrt{2}}\end{pmatrix}

=[tex][tex]\begin{pmatrix}\frac{1}{\sqrt{2}}&-\frac{1}{\sqrt{2}}\\\frac{1}{\sqrt{2}}&\frac{1}{\sqrt{2}}\end{pmatrix}[/tex][/tex].$$Thus, the matrix A of the linear transformation T is$$A=\begin{pmatrix}\frac{1}{\sqrt{2}}&-\frac{1}{\sqrt{2}}\\\frac{1}{\sqrt{2}}&\frac{1}{\sqrt{2}}\end{pmatrix}.$$

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Find the eigenvalues A1, A2 and the corresponding eigenvectors v₁, v2 of the matrix A below A= (-2²-²) 0 3 Question 3 Write the eigenvalues in ascending order: X1 12 Write the eigenvectors in their simplest form, by choosing one of the components to be 1 or -1 and without simplifying any fractions that might appear: 21 22 The syntax for entering a vector is

Answers

Therefore, the eigenvector corresponding to λ₁ = 3 is v₁ = [1, 5/2].  Therefore, the eigenvector corresponding to λ₂ = -2 is v₂ = [1, 0].

To find the eigenvalues and corresponding eigenvectors of matrix A, let's perform the calculations:

The given matrix is A = [[-2, 2], [0, 3]].

To find the eigenvalues, we solve the characteristic equation:

det(A - λI) = 0

where λ is the eigenvalue and I is the identity matrix.

A - λI = [[-2-λ, 2], [0, 3-λ]]

Calculating the determinant:

det(A - λI) = (-2-λ)(3-λ) - (2*0) = λ² - λ - 6

Setting the determinant equal to zero:

λ² - λ - 6 = 0

Factoring the equation:

(λ - 3)(λ + 2) = 0

From this, we find two eigenvalues: λ₁ = 3 and λ₂ = -2.

Now, let's find the eigenvectors corresponding to each eigenvalue.

For λ₁ = 3:

(A - λ₁I)v₁ = 0

Substituting the values:

[[-2-3, 2], [0, 3-3]]v₁ = [[-5, 2], [0, 0]]v₁ = 0

Simplifying the equation, we get:

-5v₁₁ + 2v₁₂ = 0

Choosing v₁₁ = 1, we can solve for v₁₂:

-5(1) + 2v₁₂ = 0

v₁₂ = 5/2

Therefore, the eigenvector corresponding to λ₁ = 3 is v₁ = [1, 5/2].

For λ₂ = -2:

(A - λ₂I)v₂ = 0

Substituting the values:

[[-2-(-2), 2], [0, 3-(-2)]]v₂ = [[0, 2], [0, 5]]v₂ = 0

Simplifying the equation, we get:

2v₂₁ = 0

Choosing v₂₁ = 1, we can solve for v₂₂:

2(1) = 0

v₂₂ = 0

Therefore, the eigenvector corresponding to λ₂ = -2 is v₂ = [1, 0].

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Q10: By using completing the square, factorise -3x² + 2x +1.

Answers

To factorize -3x² + 2x + 1 using completing the square, we follow the steps given below.

Step 1: Rewrite the quadratic equation in the form ax² + bx + c. This gives a = -3, b = 2, and c = 1.

Thus, the equation becomes -3x² + 2x + 1 = 0.

Step 2: Divide the equation throughout by -3 to get x² - (2/3)x - (1/3) = 0.

Step 3: To make the left-hand side of the equation a perfect square, we add and subtract `1/9` as shown below: x² - [tex](2/3)x + 1/9 - 1/9 - 1/3[/tex]= 0.

Step 4: Rearrange the terms to get x²[tex]- (2/3)x + 1/9 = 1/3[/tex].

Step 5: Factorize the left-hand side of the equation as (x - 1/3)² = 1/3 + 1/9. This gives (x - 1/3)² = 4/9.

Step 6: Take the square root of both sides of the equation to get x - 1/3 = ± 2/3.Thus, x = 1/3 ± 2/3.Simplifying the solution, we get x = 1 or x = -1/3.

We can use completing the square to factorize -3x² + 2x + 1. The steps involved in factorizing the equation are given above.

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Suppose the population of a species of animals on an island is governed by the logistic model with relative
rate of growth k= 0.05 and carrying capacity M = 15000. I.e., the population function P() satisfies the
equation P'= bP(15000 - P), where b = k / M. If the current population is P(O) = 20000, which one of the
following is closest to P(1)?

Answers

There is no valid solution for P(1) given the initial condition P(0) = 20000 in the logistic model.

To find the population P(1) at time t = 1, we can use the logistic model equation and solve it using separation of variables.

The logistic model equation is given by:

P' = bP(15000 - P)

where b = k / M, k is the relative rate of growth, and M is the carrying capacity.

First, let's calculate the value of b:

b = k / M

= 0.05 / 15000

= 1/300000

Now, we can separate variables and integrate:

∫(1 / (P(15000 - P))) dP = ∫(b dt)

To integrate the left-hand side, we can use the partial fraction decomposition:

1 / (P(15000 - P)) = A / P + B / (15000 - P)

Multiplying both sides by P(15000 - P), we get:

1 = A(15000 - P) + BP

Setting P = 0, we find A = 1/15000.

Setting P = 15000, we find B = 1/15000.

Now, we can integrate:

∫(1 / (P(15000 - P))) dP = ∫(1/15000) / P dP + ∫(1/15000) / (15000 - P) dP

= (1/15000) ln(P) - (1/15000) ln(15000 - P) + C

= (1/15000) ln(P / (15000 - P)) + C

On the right-hand side, we have:

∫(b dt) = b t + C

Combining both sides of the equation:

(1/15000) ln(P / (15000 - P)) + C' = b t + C

Simplifying:

ln(P / (15000 - P)) = 15000 b t + C

where C = 15000 (C'-C).

Exponentiating both sides:

[tex]P / (15000 - P) = e^{(15000 b t + C)}[/tex]

Rearranging the equation:

[tex]P = (15000 - P) e^{(15000 b t + C)}[/tex]

Multiplying both sides by (15000 - P):

[tex]P (1 + e^{(15000 b t + C)}) = 15000 e^{(15000 b t + C)}[/tex]

Dividing both sides by[tex](1 + e^{(15000 b t + C))}[/tex]:

[tex]P = 15000 e^{(15000 b t + C)} / (1 + e{^(15000 b t + C))}[/tex]

Now, we can substitute the values P(0) = 20000 and t = 1:

[tex]20000 = 15000 e^{(15000 b * 0 + C)} / (1 + e^{(15000 b * 0 + C))}[/tex]

[tex]20000 = 15000 e^C / (1 + e^C)[/tex]

Solving for C:

[tex](1 + e^C) * 20000 = 15000 e^C[/tex]

[tex]20000 + 20000 e^C = 15000 e^C[/tex]

[tex]20000 = 15000 e^C - 20000 e^C[/tex]

[tex]20000 = -5000 e^C[/tex]

[tex]e^C = -20000 / 5000\\ = -4[/tex]

Since [tex]e^C[/tex] cannot be negative, this solution is not valid.

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Abdurrahman wants to go to the movies ($11.00) and get popcorn ($4.50) and a coke ($2.95). He asks for at most $20.00. His dad gives him $18.00.

T/F Abdurrahman got what he asked for.

Select one:
True
False

Answers

Answer:

True

Step-by-step explanation:

1) Add up the cost of all items.

11+4.50+2.95=18.45

2) Compare with 18.

18.45>18

Therefore, Abdurrahman got what he asked for.

Mr. Netto's is surrounded by zombies. To get away, he decides to lob a bottle of zombie killing gas in the air. This is modeled by the equation h(t)=−2t 2
−5t+20 where t is the time is seconds and h(t) is the height in metres. He then throws another bottle of gas straight at the first one. The equation for the path of this bottle is g(t)=6t−1. a. Use the discriminant to prove that Mr. Netto has good aim. (That the 2 bottles will collide at some point) [ 3 marks] b. How long did it take for the 2 bottles to collide? [ 4 marks] c. How high in the air did this happen?

Answers

The two bottles will collide when they are at a height of 1m.

a. To prove that Mr. Netto has good aim, we need to use the discriminant.

Given: h(t) = −2t² − 5t + 20 - Equation 1

g(t) = 6t − 1 - Equation 2

To get when the two bottles will collide, we need to solve for when h(t) = g(t)

Substitute the two equations (equation 1 and equation 2) to get:

6t − 1 = −2t² − 5t + 20

Rearrange the equation to be in standard quadratic form: 2t² + 11t − 21 = 0

We have the standard quadratic equation, ax² + bx + c = 0

where a = 2, b = 11, and c = −21.

Using the discriminant, b² − 4ac, we have: 11² − 4(2)(−21) = 529

We notice that the discriminant is positive, that is, b² − 4ac > 0. Therefore, Mr. Netto has good aim.

b. To find out the time it took for the two bottles to collide, we set the two equations to be equal. We get:

−2t² − 5t + 20 = 6t − 1

Simplify the equation and rearrange it to be in standard quadratic form: 2t² + 11t − 21 = 0

We will use the quadratic formula to solve for t:

[tex]t = \frac{-b ± \sqrt{b^2-4ac}}{2a}[/tex]      ⇒     [tex]t=\frac{-11\pm\sqrt{529}}{4}[/tex]

Therefore:[tex]t = \frac{-11 + 23}{4}=3[/tex]    or  [tex]t = \frac{-11 - 23}{4}=-8[/tex]

Since we need to find the time, we ignore the negative time. Therefore, the two bottles will collide in 3 seconds.

c. To get the height at which the two bottles will collide, we substitute the time found in part b (t=3) to any of the two equations (equation 1 or equation 2).

Substituting 3 in equation 1:h(3) = −2(3)² − 5(3) + 20 = 1

Therefore, the two bottles will collide when they are at a height of 1m.

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Borrowing at _________ is a major reason for the ______ standard of living in the United States.



a) high interest rates; rising

b) high interest rates; declining

c) low interest rates; rising

d) low interest rates; declining

Answers

Borrowing at low interest rates is a significant factor in the rising standard of living in the United States.

The correct answer is c) low interest rates; rising.

Borrowing at low interest rates is a major reason for the rising standard of living in the United States. When interest rates are low, it becomes more affordable for individuals, businesses, and the government to borrow money for various purposes such as purchasing homes, starting businesses, or investing in infrastructure.

Low interest rates mean that the cost of borrowing is lower, allowing people to access credit more easily and at a lower cost. This enables individuals and businesses to make large purchases or investments that they might not be able to afford otherwise. For example, low mortgage interest rates make homeownership more affordable, and low business loan rates facilitate entrepreneurship and business expansion.

Moreover, low interest rates can stimulate economic activity and boost consumer spending, which further contributes to a rising standard of living. When people can borrow money at lower costs, they have more disposable income, which can be spent on goods and services, driving economic growth and job creation.

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Now consider a Poisson distribution with the expected number of occurrences per interval equal to 4.10. Use the table of Poisson probabilities to determine the probability that the number of occurrences per interval is at least 3. a. 0.7762 b. 0.7897 c. 0.2238 d. 0.2103 e. 0.1904

Answers

The probability that the number of occurrences per interval in a Poisson distribution with an expected value of 4.10 is at least 3 is approximately 0.7897. Therefore, the correct answer is b) 0.7897.

To solve this problem, we can use the Poisson distribution table. The Poisson distribution is commonly used to model the number of events occurring in a fixed interval of time or space, given the average rate of occurrence.

In this case, the expected number of occurrences per interval is given as λ = 4.10. To find the probability of at least 3 occurrences, we need to calculate the cumulative probability for x = 3, 4, 5, and so on, up to infinity.

Using the Poisson distribution table, we look for the values of x = 3, 4, 5, and so on, and sum up their probabilities. The cumulative probability represents the probability of getting the desired outcome or a larger number of occurrences.

Calculating the cumulative probability, we find that the probability of having at least 3 occurrences per interval is approximately 0.7897, which corresponds to option b.

Therefore, the answer is b) 0.7897.

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Find The Directional Derivative At (1,1) If ∇F(1,1)=(3,−1) In The Direction Of The Unit Vector U=J ? Select One: −2 0 1 −1 None Of Them

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The directional derivative of a function f at a point (1, 1) in the direction of a unit vector u = j is given by the dot product of the gradient of f at (1, 1) and the unit vector u. Therefore, the directional derivative is:

∇f(1, 1) · u = (3, -1) · (0, 1) = -1

The directional derivative of a function f at a point (1, 1) in the direction of a unit vector u is the rate at which the function changes at that point with respect to the direction of the unit vector.

To find the directional derivative, we need to take the dot product of the gradient of f at (1,1) with the unit vector u. The gradient of f is a vector that points in the direction of the greatest increase of f at (1,1), and its magnitude is the rate of change of f in that direction. Therefore, taking the dot product of the gradient with the unit vector gives us the projection of the gradient onto the unit vector, which is the magnitude of the rate of change of f in the direction of u.

In this case, ∇f(1,1) = (3,-1) is the gradient of f at the point (1,1), and u = j = (0,1) is a unit vector pointing in the y-direction. Taking the dot product, we get:

∇f(1,1) · u = (3,-1) · (0,1) = 0 + (-1)(1) = -1

This means that the rate of change of f at (1,1) in the direction of the y-axis (or the j direction) is -1. Therefore, if we were to move a small distance in the j direction from the point (1,1), the value of f would decrease by about -1 times that distance (if f is decreasing in that direction).

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QUESTION 1 If the nuil space of a \( 4 \times 6 \) matrix has dimension 4 , what is the dimension of the column space of the matrix? 1 2 3 4 15 6

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The dimension of the column space of the matrix is 2. The dimension of the null space of a matrix is also known as the nullity.

In this case, if the nullity of the \(4 \times 6\) matrix is 4, it means that there are 4 linearly independent vectors that satisfy the equation \(Ax = 0\), where \(A\) is the matrix and \(x\) is a vector.

The null space consists of all the vectors that get mapped to the zero vector when multiplied by the matrix. Geometrically, it represents the set of solutions to a homogeneous system of linear equations.

Now, the rank-nullity theorem states that for any matrix \(A\), the sum of the rank and nullity of \(A\) is equal to the number of columns of \(A\). In this case, we have a \(4 \times 6\) matrix, so it has 6 columns.

Using the rank-nullity theorem, we can find the dimension of the column space (also known as the rank) of the matrix:

\[ \text{{rank}}(A) + \text{{nullity}}(A) = \text{{number of columns of }} A\]

\[ \text{{rank}}(A) + 4 = 6\]

\[ \text{{rank}}(A) = 6 - 4\]

\[ \text{{rank}}(A) = 2\]

Therefore, the dimension of the column space of the matrix is 2.

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Word problem using relative rates. 30 pts.

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The speed of the reflection of the security strobe lights along the wall of the movie theater when the reflection is 30 ft from the car is -50πcos(12π/25) ft/s.

How to calculate the speed

Using trigonometry, we have:

cos(θ) = adjacent/hypotenuse

cos(θ) = x/25

Since θ = 2πt, we can rewrite this as:

cos(2πt) = x/25

In order to find the rate at which x is changing, we need to differentiate both sides of this equation with respect to t:

-d(sin(2πt))/dt = dx/dt / 25

Using the chain rule and differentiating sin(2πt), we get:

-2πcos(2πt) = dx/dt / 25

Now, we can solve for dx/dt, which represents the rate at which the reflection is moving along the wall:

dx/dt = -50πcos(2πt)

Substituting x = 30, we find the speed of the reflection when it is 30 ft from the car:

dx/dt = -50πcos(2πt) = -50πcos(2πt) = -50πcos(2π(30)/25) = -50πcos(12π/25)

Therefore, the speed of the reflection of the security strobe lights along the wall of the movie theater when the reflection is 30 ft from the car is -50πcos(12π/25) ft/s.

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\( I=\int \frac{2 x^{2}-x-1}{x^{3}-4 x} \mathrm{~d} x \)

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The integral of the given function is to be found. The given function is: First, the denominator is factored.

The partial fraction Multiplying both sides by the denominator, To find the values of A, B and C, we substitute

The given function is: First, the denominator is factored.  To find the values of A, B and C, we substitute The partial fraction Multiplying both sides by the denominator,.

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Recall that the symbol z represents the complex conjugate of z. If z= a + bl, show that the statement is true. z + z is a real number. Use the definition of complex conjugates to simplify the expressi

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The statement z + z is a real number is true, and it simplifies to 2a, where a is the real part of the complex number z.

To show that z + z is a real number, we need to use the definition of complex conjugates and simplify the expression.

Given z = a + bi, the complex conjugate of z is denoted as z* and is defined as z* = a - bi.

Now, let's compute z + z*:

z + z* = (a + bi) + (a - bi)

Using the distributive property, we can simplify the expression:

z + z* = a + a + bi - bi

Combining like terms, we get:

z + z* = 2a + 0i

Since the imaginary part of the expression is zero (0i), we can conclude that z + z* is a real number, specifically 2a.

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The functions\Psin(x) = (2/a)1/2\sin(nπx/a) and\Psim(x) = (2/a)1/2\sin(mπx/a) are eigenfunctions for a particle in an infinite one-dimensional well. Show that, if n\neqm, these two eigenfunctions are orthogonal. Could their orthogonality have been deduced without integrating? How? [Hint:\sin(ax) can be written in the form (eiax - e-iax)/(2i)].

Answers

To show that the eigenfunctions Ψn(x) = [tex](\frac{2}{a}) ^{1/2(sin(n\pi x/a))}[/tex] = [tex](\frac{2}{a}) ^{1/2(sin(m\pi x/a))}[/tex]are orthogonal when n ≠ m, we need to evaluate their inner product and demonstrate that it equals zero.

The inner product of two functions f(x) and g(x) is given by the integral:

⟨f, g⟩ = ∫f(x)g*(x) dx

where g*(x) denotes the complex conjugate of g(x).

⟨Ψn, Ψm⟩ = ∫Ψn(x)Ψm*(x) dx

⟨Ψn, Ψm⟩ = ∫[[tex](\frac{2}{a}) ^{1/2(sin(n\pi x/a))}[/tex]][[tex](\frac{2}{a}) ^{1/2(sin(m\pi x/a))}[/tex]] dx

⟨Ψn, Ψm⟩ = (2/a) ∫sin(nπx/a)sin(mπx/a) dx

⟨Ψn, Ψm⟩ = (2/a) ∫[(cos((n-m)πx/a) - cos((n+m)πx/a))/2] dx

⟨Ψn, Ψm⟩ = (1/a) ∫cos((n-m)πx/a) dx - (1/a) ∫cos((n+m)πx/a) dx

⟨Ψn, Ψm⟩ = (1/a) [∫([tex]e^{(n-m)\pi x/a}[/tex] - [tex]e^{-i(n-m)\pi x/a}[/tex])/(2i) dx - ∫([tex]e^{i(n+m)\pi x/a}[/tex] - [tex]e^{-i(n+m)\pi x/a}[/tex])/(2i) dx]

⟨Ψn, Ψm⟩ = (1/a) [([tex]e^{i(n-m)\pi x/a}[/tex]]

Therefore, the sines of different multiples of πx/a are orthogonal.

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3. Draw triangle \( A B C \) with \( b=12 \mathrm{~cm} B=39^{\circ} \mathrm{cm} \), and \( A=70^{\circ} \mathrm{cm} \) then solve it. Round off your lengths to the nearest whole number.

Answers

Answer: The length of sides AC and BC are 18 cm and 8 cm respectively.

Solution: We have a triangle ABC in which AB = 12 cm, B = 39° and A = 70°. We need to find the length of the other sides of the triangle.

Step 1: Draw the triangle ABC with the given information. Mark the angles and sides with their respective names.

Step 2: We know that the sum of angles in a triangle is 180°. Therefore, C = 180° - (A + B) = 180° - (70° + 39°) = 71°

Step 3: We have angle A and side AB. To find the length of side AC, we will use the sine rule.[tex]\(\frac{a}{\sin A}=\frac{b}{\sin B}=\frac{c}{\sin C}\) \(\therefore\) \(\frac{AC}{\sin 70^{\circ}}=\frac{12}{\sin 39^{\circ}}\) \(\Rightarrow \\\\AC=\frac{12\sin 70^{\circ}}{\sin 39^{\circ}}\)\\\\ AC=\frac{12\times 0.9397}{0.6293}\) \\\\\AC=17.93\) cm ≈ 18 cm[/tex]

Step 4: We have angle B and side AB. To find the length of side BC, we will use the sine rule.[tex]\(\frac{a}{\sin A}=\frac{b}{\sin B}=\frac{c}{\sin C}\)\\ \\\\therefore\) \(\frac{BC}{\sin 39^{\circ}}=\frac{12}{\sin 70^{\circ}}\) \\\\Rightarrow BC=\frac{12\sin 39^{\circ}}{\sin 70^{\circ}}\) \(\\\\BC=\frac{12\times 0.6293}{0.9397}\) \\\\\BC=8.03\) cm ≈ 8 cm[/tex]

Therefore, the length of sides AC and BC are 18 cm and 8 cm respectively.

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For the given average cost function AC(Q)=178 +64-12Q+¹2 ( Minimize the Marginal Cost MC(Q). Use 3-step optimization process: 1. Find the critical values of the function the is to be optimized 2. Use second-derivative condition to eliminate unwanted critical values 3. Find the optimal value of the function Round to the nearest dollar. Answer: Choose...

Answers

The given average cost function is

AC(Q)=178 +64-12Q+¹2. It is required to minimize the marginal cost,

MC(Q) by using a 3-step optimization process. The optimization process will involve finding the critical values of the function, eliminating unwanted critical values using the second-derivative condition, and finding the optimal value of the function. Finally, the answer will be rounded to the nearest dollar.

1. Finding critical values of the function to be optimized

The marginal cost, MC(Q) is obtained by finding the first derivative of AC(Q) with respect to Q, and is given as

MC(Q)= dAC(Q)/dQ= -12+Q/6.

Now, the critical value of MC(Q) is obtained by setting the first derivative to zero and solving for Q.

Thus,-12+Q/6=0=> Q=72

Therefore, the critical value of Q is 72.2.

Eliminating unwanted critical values using the second-derivative condition

The second derivative of AC(Q) is given as d²AC(Q)/dQ² = 1/6.

Since the second derivative is positive for all Q, the critical value of Q obtained in step 1 is the minimum value of AC(Q).

3. Finding the optimal value of the function

The minimum value of AC(Q) is obtained by substituting the value of Q into the given function.

Thus, AC(Q)= 178 + 64 - 12Q + ¹2=> AC(72) = 178 + 64 - 12(72) + ¹2= $242

The optimal value of the function is $242. Hence, the answer is 242 rounded to the nearest dollar.

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Pharmaceutical companies promote their prescription drugs using television adivertising. In a survey of 75 randomly sampled tolevision viewers. 6 indlcated that they asked their physician about using a prescription drug they saw advertised on TV. a. What is the point estimate of the popuration proportion? (Round your answers to 1 decimal places.) b. What is the margin of error for a 90% confidence interval ostimote? (Round your answers to 2 decimal places.) Compute the 90% confidence interval for the population proportion. (Round your answers to 3 decimal places.)

Answers

a. The point estimate of the population proportion is the sample proportion, which is calculated by dividing the number of viewers who asked their physician about using a prescription drug by the total sample size:

Point estimate = Number of viewers who asked about prescription drug / Total sample size

In this case, the number of viewers who asked about prescription drugs is 6, and the total sample size is 75.

Point estimate = 6 / 75 = 0.08 (or 8.0%)

b. The margin of error for a 90% confidence interval can be calculated using the following formula:

Margin of error = Critical value * Standard error

To find the critical value, we need to determine the z-score associated with a 90% confidence level. Since the sample size is large (n > 30), we can use the standard normal distribution.

The critical value for a 90% confidence level is approximately 1.645.

The standard error can be calculated as:

Standard error = sqrt((point estimate * (1 - point estimate)) / n)

Substituting the values:

Standard error = sqrt((0.08 * (1 - 0.08)) / 75) ≈ 0.0377

Now, we can calculate the margin of error:

Margin of error = 1.645 * 0.0377 ≈ 0.062 (or 0.06)

c. The 90% confidence interval for the population proportion can be calculated by subtracting and adding the margin of error to the point estimate:

Lower bound = Point estimate - Margin of error

Upper bound = Point estimate + Margin of error

Substituting the values:

Lower bound = 0.08 - 0.06 = 0.02 (or 2.0%)

Upper bound = 0.08 + 0.06 = 0.14 (or 14.0%)

The 90% confidence interval for the population proportion is approximately 0.02 to 0.14 (or 2.0% to 14.0%).

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(a) Consider at distribution with 12 degrees of freedom. Compute P(12≥1.58). Round your answer to at least three decimal places. P(t2≥1.58) = 0

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The value of P(12≥1.58) is equal to zero since the t-distribution with 12 degrees of freedom is symmetric about 0. Therefore, P(12≥1.58) is less than 0.5.

We are given a distribution with 12 degrees of freedom. We are required to compute P(12≥1.58).

We have P(t2≥1.58) = 0.

Therefore, the value of P(12≥1.58) is equal to zero since the t-distribution with 12 degrees of freedom is symmetric about 0.

Hence, it follows that P(12≥1.58) is less than 0.5.

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Find the exact value of the following trigonometric expression. Do not use any trigonometric functions on a calculator or other technology, as they will not provide you with exact answers. Decimal approximations will be marked wrong. cos[2tan ^−1 (−63/12 )]=

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The exact value of the trigonometric expression cos[2tan^(-1)(-63/12)] is -2016/1700.

To find the exact value of the trigonometric expression cos[2tan^(-1)(-63/12)], we can use trigonometric identities and properties.

Let's begin by finding the value of tan^(-1)(-63/12). We know that tan^(-1)(x) represents the inverse tangent function, which gives us an angle whose tangent is x. Therefore:

tan^(-1)(-63/12) = angle whose tangent is -63/12

To find this angle, we can use the property that tan^(-1)(-x) = -tan^(-1)(x). So:

tan^(-1)(-63/12) = -tan^(-1)(63/12)

Next, we can simplify tan^(-1)(63/12). The numerator 63 and denominator 12 can both be divided by 3:

tan^(-1)(63/12) = tan^(-1)(21/4)

Now, we can find the value of 2tan^(-1)(21/4) using the double-angle formula for tangent:

tan(2θ) = (2tan(θ))/(1 - tan^2(θ))

In this case, θ = tan^(-1)(21/4). Substituting the values:

tan(2tan^(-1)(21/4)) = (2tan(tan^(-1)(21/4)))/(1 - tan^2(tan^(-1)(21/4)))

Since tan(tan^(-1)(x)) = x, we can simplify further:

tan(2tan^(-1)(21/4)) = (2(21/4))/(1 - (21/4)^2)

tan(2tan^(-1)(21/4)) = (42/4)/(1 - 441/16)

tan(2tan^(-1)(21/4)) = (42/4)/(16/16 - 441/16)

tan(2tan^(-1)(21/4)) = (42/4)/(16 - 441)/16

tan(2tan^(-1)(21/4)) = (42/4)/(-425/16)

tan(2tan^(-1)(21/4)) = (42/4) * (-16/425)

tan(2tan^(-1)(21/4)) = -2016/1700

Now, we can find cos(-2016/1700) using the unit circle or other trigonometric methods. Unfortunately, the exact value of cos(-2016/1700) is not a well-known value and cannot be simplified further.

Therefore, the exact value of the trigonometric expression cos[2tan^(-1)(-63/12)] is -2016/1700.

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We wish to see if this percentage is the same among the 25 to 30 age group. a) How many of this younger age group must we survey in order to estimate the proportion of non-grads to within 10% with 90% confidence? n= (Round up to the nearest integer.) Question 6 (5 points)How is the connecting rod attached to the piston?A bearing insert.A wrist pin.A main journal.A rod journal. What is the key purpose of a distribution center in the supply chain?A.) It helps retailers manage payroll in multiple locations.B.) It is usually the only fulfillment center for stores e-commerce sites.C.) It provides job opportunities at the brick-and-mortar level.D.) It is usually where finished products go before being shipped to stores Short-circuit evaluation may be harmful to code correctness. Explain this issue briefly considering the following code snippet. 4. Is evaluation order of expressions important for the following code? Why? int t=0; int swap (pass_by_ref i, pass_by_ref j) { t = *i; *1 = *j; *j = t; return t; scanf ("%d", &n); m = 5; printf (t + swap (n, m) ); assert (t == 0); 5. In the code given in part b, sometimes we may receive an assertion failure. What is the reason for this failure? Propose a solution to get rid of this failure while still keeping the "assert (t=0)" statement. if (k == 0 || n > j++) void main () { Write each of the given numbers in the polar form re i, What is the basic gist of chapter 7-8 in the book uglies by scottwestfeld Most Canadian organizations today tend to plan for their workforce based on the firm's immediate needs or gaps between human capital demand and supply True False Question 4 Human capital must be obtained from a source that is either internal and/or external to the organization True False Show that k=1nk2 k=(n1)2 n+1+2. Suppose that you have 3 and 8 cent stamps, how much postage can you create using these stamps? Prove your conjecture using strong induction. Find a big Theta Notation for the following and then prove: a. 2+4+6+...+2n b. 2logn+4n+3nlogn explain how there can be rainfall in the midlatitudes of more thanone inch if there is only an inch of precipitable water in a calumnof the atmosphere. Assume that the population of a store customers is infinite. For this population, the proportion of those customers who buy the service plan is 0.20. For the sample size of 225, find the standard deviation of the sampling distribution of the sample proportion (standard error). Round your answer to four decimal places. Does the equation y ^2 x ^2 =3 define y as a functiol \end{tabular} \begin{tabular}{ll} & a) Yes b) No Use the information provided in the Tabular Report below to perform the following activities:1. Construct an Arrow-On-Node Diagram.2. Construct a CPM network diagram.3. Construct a Gantt Chart showing Unsmoothed ES, EF, and Floats.4. Complete the Unsmoothed Human Resource Histogram.5. Construct a Gantt Chart showing the Smoothed ES, EF, and Floats6. Complete the Smoothed Human Resource Histogram.7. The maximum resources available is 5ACTIVITYPRECEDINGACTIVITYDURATIONHUMANRESOURCESA-34BA22CA45,3,3,2DA12EB, C34,5,7FD21GE, F21 Consider the function f(x,y)=x 2y+xy 2+xy Which of the following statements are true for f? SELECT ALL. TRUE STATEMENTS. Selectionnez 2 reponse(s) correcte(s) a) (1.0) is the only crital point of f. b) (0,1) and (1,0) are the only critical points of f. c) (0,1) is a local maximum for f. d) (0,0) and (1,0) are saddle points for f. b) (0,1) and (1,0) are the only critical points of f. c) (0,1) is a local maximum for f. d) (0,0) and (1,0) are saddle points for f. e) (0,0) is a local maximum for f. f) (1/3,1/3) is a local maximum for f. g) (0,1) and (1,0) are local minima for f Use resonance structures to identify the areas of high and low electron density in the following compounds: a. H 2C=CHNO 2b. c. d. e. f. CH 3OCH=CHCN If the sequence of element 5, 7, 9, 1, 3, 10, 8, 4 are inserted into binary search tree, which one of the following is the correct sequence of level order traversal of the tree? 5,1,7,3,9,4,8,10 1,3,4,5,7,8,9,10 5,1,3,4,7,9,8,10 4,3,1,8,10,9,7,5 \( \sum_{n=1}^{\infty} \frac{(n !)^{2} x^{n}}{(2 n) !} \)