Test the claim that for the adult population of one town, the mean annual salary is given by µ=$30,000. Sample data are summarized as n=17, x(bar)=$22,298 and s=$14,200. Use a significance level of α=0. 5. Assume that a simple random sample has been selected from a normally distribted population

Answer:

The function is f(x)=2x

Step-by-step explanation:

Since every single y is 2 times x, it will be 2x. This function just doubles whatever x you put in.

Answer:

Step-by-step explanation:

Those are coordinate points on a line but they are written in table form.

For the first point,  when x=1, y=2  (that's given from the table) but it's a point on the line (1, 2)

The next point (2,4),

(3,6) and so forth.

The format for a line is

y=mx+b (slope-intercept form)

or

[tex]y-y_{1} = m(x-x_{2})[/tex]   (point-slope form)

They did not give you the y-intercept (that's when x=0) in the chart.  You may have been able to figure it out by looking at the pattern but if not we will use the second formula, point slope form, because we know a point from the chart and we can find slope

[tex]slope=m=\frac{y_{2}- y_{1} }{x_{2}- x_{1} }[/tex]    

pick any 2 points from the chart to find slope.  I will pick (1,2) and (2,4)

[tex]m=\frac{4-2}{2-1 } =\frac{2}{1} =2[/tex]

Now that i know slope m=2  and i will pick (1,2) to plug into formula

[tex]y-y_{1} = m(x-x_{2})[/tex]

y-2=2(x-1)       distribute 2

y-2=2x-2          add 2 to both sides

y=2x

The function is increasing at a rate of 2 and the y-intercept is 0.

1.) [tex]y(y + 4) - y = 6[/tex] ✅Are Quadratic Functions.

2.)  [tex](3x + 2) + (6x - 1) = 0[/tex] ❌ Not a Quadratic Function.

3.) [tex]4b(b) = 0[/tex] ✅ Are Quadratic Functions.

4.) [tex]3a - 7 = 2 (7a - 3)[/tex] ❌ Not a Quadratic Function.

Answer:

A & C

Step-by-step explanation:

Got It right on edge.

The given procedure does result in a binomial distribution. This is because it meets the necessary conditions for a binomial distribution:

1. Fixed number of trials: There are 74 trials (rolling the die 74 times).
2. Two outcomes: The outcome of each roll is either odd (success) or even (failure).
3. Independent trials: The outcome of one roll does not affect the outcome of any other roll.
4. Constant probability: The probability of rolling an odd number remains the same for each roll (1/2, since there are 3 odd numbers out of 6 sides).'

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The expected number of problems to be resolved today is 10, the standard deviation is 1.3693, the probability that 10 problems can be resolved today is 0.2146, the probability that 10 or 11 problems can be resolved today is 0.3246, and the probability that more than 8 problems can be resolved today is 0.816.

To answer these questions, we will use the binomial distribution since we are dealing with a fixed number of independent trials (the 13 cases reported) with only two possible outcomes (resolved or not resolved).

Let's start with the first question:

Expected number of problems resolved today:

E(X) = n * p = 13 * 0.75 = 9.75

So we would expect about 9.75 problems to be resolved today, but since we cannot have a fraction of a problem, we should round this to 10.

Now let's move on to the second question:

Standard deviation:

σ = sqrt(np(1-p)) = sqrt(13 * 0.75 * 0.25) = 1.3693 (rounded to 4 decimal places).

For the third question:

Probability that 10 of the problems can be resolved today:

P(X=10) = (13 choose 10) * (0.75)^10 * (1-0.75)^(13-10) = 0.2146 (rounded to 4 decimal places).

For the fourth question:

Probability that 10 or 11 of the problems can be resolved today:

[tex]P(X=10 or X=11) = P(X=10) + P(X=11) = (13 choose 10) * (0.75)^10 * (1-0.75)^(13-10) + (13 choose 11) * (0.75)^11 * (1-0.75)^(13-11) = 0.3246 (rounded to 4 decimal places).[/tex]

For the fifth question:

Probability that more than 8 of the problems can be resolved today:

P(X>8) = 1 - P(X<=8) = 1 - (P(X=0) + P(X=1) + ... + P(X=8))

[tex]= 1 - ∑(13 choose i) * (0.75)^i * (1-0.75)^(13-i), for i=0 to 8.[/tex]

= 1 - 0.0003 - 0.0033 - 0.0191 - 0.0672 - 0.1562 - 0.2529 - 0.2897 - 0.2072 - 0.0881

= 0.816 (rounded to 4 decimal places).

Therefore, the probability more than 8 of the problems can be resolved today is 0.816 (rounded to 4 decimal places).

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T = 29 minutes.

The rate of hits per minute is 12, and the time interval of interest is from 8:14 P.M. to 8:43 P.M., which is 29 minutes. However, we need to adjust for the fact that the Poisson process is occurring within a larger time frame (7:00 P.M. to 9:00 P.M.).

To do this, we can find the proportion of time between 8:14 P.M. and 8:43 P.M. relative to the entire 2-hour period between 7:00 P.M. and 9:00 P.M.:

(29 minutes) / (2 hours × 60 minutes per hour) = 0.2417

So, the expected number of hits within the interval from 8:14 P.M. to 8:43 P.M. is:

lambda = (0.2417)(12 hits per minute) = 2.901

Thus, lambda = 2.901 hits per 29-minute period.

The value of t for this Poisson process is the length of the time interval we are interested in, which is:

t = 29 minutes.

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Answer:

48

Step-by-step explanation:

natural even numbers have a difference of 2 between them

let n be the minimum number , then the next 3 are

n + 2, n + 4, n + 6

sum the 4 numbers and equate to 204

n + n + 2 + n + 4 + n + 6 = 204

4n + 12 = 204 ( subtract 12 from both sides )

4n = 192 ( divide both sides by 4 )

n = 48

the 4 numbers are then 48, 50, 52, 54

with the minimum being 48

Answer: B, An arrow

Step-by-step explanation: The arrow can be folded down the middle longways to match up

Answer:

30%

Step-by-step explanation:

We Know

The market price of the scarf was $75.00

A scarf sells for $52.50

What was the percentage discounted from the scarf?

We Take

100% - (52.50 ÷ 75.00) · 100 = 30%

So, the percentage discounted from the scarf is 30%

a. If all countries act in their self-interest, each country will choose a level of abatement zi = 99.50.

b. We conclude that there is no level of abatement that maximizes the collective payoff.

c. There is no efficiency gain from full cooperation.

A derivative of a function with respect to an independent variable is what is referred to as differentiation. Calculus's concept of differentiation can be used to calculate the function per unit change in the independent variable.

(a) If all countries act in their self-interest, they will choose the level of abatement zi that maximizes their own payoff Ti. To find this level, we need to differentiate Ti with respect to zi and set the result equal to zero:

dTi/dzi = d(B;(Z) – C(zi))/dzi = d(B;(Z))/dZ * dZ/dzi - d(C(zi))/d(zi) = 10 - 0.01Zi - 50zi

Setting this expression equal to zero, we get:

10 - 0.01Zi - 50zi = 0

Solving for Zi, we get:

Zi = (10 - 0.01Zi)/50

Zi = 0.2 - 0.002Zi

Zi = 0.2/(1 + 0.002)

Zi = 99.50

Therefore, if all countries act in their self-interest, each country will choose a level of abatement zi = 99.50.

(b) If the countries cooperate to maximize the collective payoff, they will jointly choose the level of abatement that maximizes the expression:

II = B;(Z) - C(zi)

To find the optimal level of abatement, we need to differentiate II with respect to zi and set the result equal to zero:

dII/dzi = d(B;(Z))/dZ * dZ/dzi - d(C(zi))/d(zi) = 10 - 0.01Z - 50zi

Setting this expression equal to zero, we get:

10 - 0.01Z - 50zi = 0

Solving for Zi, we get:

Z = (10 - 50zi)/0.01

Z = 1000 - 5000zi

Substituting this expression for Z into the expression for zi, we get:

zi = 0.2 - 0.002(1000 - 5000zi)

zi = 0.2 - 2 + 10zi

11.8zi = -2

zi = -0.17

This result is not physically meaningful since zi must be non-negative. Therefore, we conclude that there is no level of abatement that maximizes the collective payoff.

(c) Since there is no level of abatement that maximizes the collective payoff, cooperation does not result in a Pareto improvement in this case. There is no efficiency gain from full cooperation.

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The MLE of λ = 1/p is:

â = 1/0.6364 = 1.5714 (rounded to four decimal places).

Let Y be the number of components that survive 24 hours. Then Y ~ Bin(22, p), where p is the probability that a component survives 24 hours. The maximum likelihood estimator (MLE) of p is the sample proportion of components that survive 24 hours, which is y/n = 14/22 = 0.6364.

Now, let X be the lifetime of a component, which is exponentially distributed with parameter λ = 1. Then the probability that a component survives 24 hours is P(X > 24) = e^(-24λ). Substituting λ = 1, we get p = e^(-24).

The likelihood function L(p) is then given by:

L(p) = (22 choose 14) * p^14 * (1-p)^8

Taking the natural logarithm of L(p), we get:

ln L(p) = ln(22 choose 14) + 14 ln p + 8 ln(1-p)

To find the MLE of p, we differentiate ln L(p) with respect to p and set the result to zero:

d/dp ln L(p) = 14/p - 8/(1-p) = 0

Solving for p, we get:

p = 14/22 = 0.6364

This is the same as the MLE of p we obtained earlier, which makes sense since p = e^(-24) is a function of the MLE of p.

Therefore, the MLE of λ = 1/p is:

â = 1/0.6364 = 1.5714 (rounded to four decimal places).

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To find the percent of the population that is likely greater than 5 kilograms, we need to determine the relationship between the given information and the desired result. However, we do not have enough information to directly calculate the percentage of cats weighing more than 5 kilograms based on the given data.

It is essential to have more details, such as the distribution of weights or a specific correlation between the two weight ranges (greater than 4.5 kg and greater than 5 kg), to provide an accurate answer to your question.

In summary, with the current information available, we cannot determine the percent of the cat population that is likely greater than 5 kilograms.

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Suzanne is correct in stating that the derivative of a cubic function will always be a quadratic function.

Suzanne's statement is correct. A cubic function is a function of the form [tex]f(x) = ax^3 + bx^2 + cx + d[/tex], where a, b, c, and d are constants.

To find its derivative, we need to differentiate each term of the function with respect to x. The derivative of a constant term d is 0, so we can ignore it. We have:

[tex]f'(x) = 3ax^2 + 2bx + c[/tex]

As we can see, the derivative of a cubic function is a quadratic function of the form g(x) = [tex]3ax^2 + 2bx + c[/tex].

Therefore, Suzanne is correct.

Recall that a cubic function is a function of the form[tex]f(x) = ax^3 + bx^2 + cx + d,[/tex]

where a, b, c, and d are constants.

To find the derivative of this function, we need to differentiate each term with respect to x.

The derivative of a constant term d is 0, so we can ignore it.

Applying the power rule of differentiation, we get:

[tex]f'(x) = 3ax^2 + 2bx + c[/tex]

As we can see, the derivative of a cubic function is a quadratic function of the form g(x) = [tex]3ax^2 + 2bx + c.[/tex]

Therefore, Suzanne is correct in stating that the derivative of a cubic function will always be a quadratic function.

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[tex]cos^−1(cos(a))[/tex]  simplifies to 4π/3 where identity [tex]cos(cos^−1(x)) = x[/tex]  is used which implies that on the off chance that we take the inverse cosine of the cosine of an angle, we'll get back the initial angle (within the run [0, π]).

to begin with, [tex]cos^−1(cos(a)) = a[/tex], in the event that a is within the range [0, π].

In any case, in this case, a = 16π/3 radians, which is more prominent than 2π (i.e., a full circle), so we got to bring it back into the range [0, π]. We will do this by subtracting 2π from an until it is within the run [0, π]:

a = 16π/3 - 2π = 10π/3

Directly, we are ready to utilize the character[tex]cos(cos^−1(x)) = x[/tex] once more to rearrange the expression:

[tex]cos^−1(cos(a)) = cos^−1(cos(10π/3)) = 10π/3 - 2π = 4π/3[/tex]

Therefore,[tex]cos^−1(cos(a))[/tex] simplifies to 4π/3. 

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The value of z on the system of equations is given as follows:

D. 4.

The system of equations in the context of this problem is defined as follows:

Replacing the first equation into the third equation, the value of x is obtained as follows:

3x - (-2x + 14) = 16

3x + 2x - 14 = 16

5x = 30

x = 6.

Replacing x = 6 onto the second equation, the value of z is obtained as follows:

3(6) - 4z = 2

18 - 4z = 2

4z = 16

z = 4.

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If total of 180 of these shapes with be strung on the necklace, the necklace contains 30 squares, 30 circles, and 30 triangles.

The sequence of shapes in the necklace follows a pattern of increasing the number of shapes in each group by one, starting with one shape of each type in the first group. This means that the necklace will contain 1+2+3=6 shapes in each group, and there are a total of 180 shapes.

To find the number of each shape in the necklace, we need to determine the number of groups in the necklace. Since there are 6 shapes in each group, we can divide the total number of shapes by 6 to get the number of groups:

180 shapes ÷ 6 shapes/group = 30 groups

This means that there are 30 groups of shapes in the necklace. Within each group, there is one square, one circle, and one triangle. Therefore, the total number of each shape in the necklace is:

1 square/group × 30 groups = 30 squares

1 circle/group × 30 groups = 30 circles

1 triangle/group × 30 groups = 30 triangles

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Answer:

Step-by-step explanation:

Let x be the measure of the smaller angle, and y be the measure of the larger angle. Then we know that:

   x + y + 100 = 180, since the sum of the angles in a triangle is 180 degrees.

   y/x = 11/5, since the other two angles are in a ratio of 5:11.

We can use the second equation to solve for y in terms of x:

y/x = 11/5

y = 11x/5

Substituting this into the first equation, we get:

x + (11x/5) + 100 = 180

Multiplying both sides by 5, we get:

5x + 11x + 500 = 900

16x = 400

x = 25

Therefore, the smaller angle measures 25 degrees, and the larger angle measures:

y = 11x/5 = 11(25)/5 = 55

So the two angles are 25 degrees and 55 degrees.

To check this make sure the sum of all the angles is 180.

55+25+100=180

The intercepts of the equation 5x - 3y = -30 include the following:

x-intercept = (-6, 0).

y-intercept = (0, 10).

In Mathematics and Geometry, the x-intercept is the point at which the graph of a function crosses the x-coordinate (x-axis) and the value of "y" or y-value is equal to zero (0).

When the y-value = 0, the x-intercept can be calculated as follows;

5x - 3y = -30

5x - 3(0) = -30

5x = -30

x = -30/5

x = -6.

When the x-value = 0, the y-intercept can be calculated as follows;

5x - 3y = -30

5(0) - 3y = -30

3y = 30

y = 30/3

y = 10.

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Complete Question:

What are the intercepts of the equation 5x - 3y = -30?

The differential dy for y = tan(4x + 6) when x = 4 and dx = 0.2 is 3.22, the differential dy for y = 3x² + 5x + 4 when x = 5 and dx = 0.2 is 30.20, and the change in y [tex]∆y[/tex] for y = [tex]4√x[/tex] when x = 2 and[tex]∆x = 0.3 is 0.848[/tex].

To find the differential of a function, we use the derivative, which is defined as the limit of the ratio of the change in y to the change in x as the change in x approaches zero. The differential dy is then given by the product of the derivative and the change in x, or simply dy = f'(x) dx.

For the function y = tan(4x + 6), we can find the derivative as follows: f'(x) = sec²(4x + 6) * 4 = 4 sec²(4x + 6) Substituting x = 4 and dx = 0.2, we get: dy = f'(4) * 0.2 = 4 sec²(22) * 0.2. Rounding to two decimal places, we get dy = 3.22.

For the function y = 3x² + 5x + 4, we can find the derivative as follows: f'(x) = 6x + 5 Substituting x = 5 and dx = 0.2, we get: dy = f'(5) * 0.2 = 6(5) + 5 * 0.2 Rounding to two decimal places, we get dy = 30.20.

For the function y = [tex]4√x[/tex], we can find the derivative as follows: f'(x) = 2/√x Substituting x = 2 and[tex]∆x = 0.3[/tex], we get: ∆y = f'(2) *[tex]∆x = 2/√2 * 0.3 = 0.848[/tex] Rounding to three decimal places, we get [tex]∆y = 0.848[/tex].

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The standard deviation of this sample of counts is 2.07.

To find the standard deviation of this sample of counts, we first need to calculate the mean (average) of the counts. Adding up all of the counts and dividing by 6, we get:
[tex]= (\frac{53 + 49 + 54 + 51 + 48 + 5)}{6})[/tex]
So the mean is 51.

Now we can calculate the variance, which measures how spread out the data is from the mean. We do this by finding the average of the squared differences between each count and the mean:

[tex]\frac{(53 - 51)^{2}+ (49 - 51)^{2}+(54 - 51)^{2}+(51 - 51)^{2}+(48 - 51)^{2}+ (51 - 51)^{2}}{6} = 4.3[/tex]

The variance is 4.3. To get the standard deviation, we take the square root of the variance:
[tex]\sqrt{4.3}=2.07[/tex] .

So the standard deviation of this sample of counts is 2.07.

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In a case whereby Samantha has 6 apples and 5 bananas in a fruit basket,the ratio of apple to banana is 6:5, the ratio of banana to total fruit is 5:11

A ratio can be desribed as the the quantitative relation that is been established when dealing with two amounts showing the number of times onethe first value contains  compare to another value.

It should be noted that the total number of the fruit is (6+5)= 11

the ,the ratio of apple to banana is 6:5, the ratio of banana to total fruit is 5:11  

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a) The demand function is p(x) = -0.001x + 59.

b) The ticket prices should be set to approximately $29.50 to maximize revenue.

(a) To find the demand function, we will use the two given points: (49,000 spectators, $10) and (51,000 spectators, $8). We can find the slope (m) and the y-intercept (b) for the linear function p(x) = mx + b.

The slope formula is (y2 - y1) / (x2 - x1). Using the given points, we get:

m = (8 - 10) / (51,000 - 49,000) = -2 / 2,000 = -0.001

Now, we can use one of the points to find the y-intercept (b). Let's use (49,000 spectators, $10):

10 = -0.001 * 49,000 + b
b = 10 + 0.001 * 49,000 = 10 + 49 = 59

So, the demand function is p(x) = -0.001x + 59.

(b) To maximize revenue, we need to find the price that results in the highest product of price and attendance. Revenue (R) = p(x) * x. Therefore, R(x) = (-0.001x + 59) * x. To find the maximum, we can take the derivative of R(x) with respect to x and set it equal to zero:

dR/dx = -0.002x + 59 = 0

Solving for x, we get:

x = 59 / 0.002 = 29,500 spectators

Now, we can plug this value into the demand function to find the optimal ticket price:

p(29,500) = -0.001 * 29,500 + 59 ≈ $29.50

So, the ticket prices should be set to approximately $29.50 to maximize revenue.

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The probability that a tire is from plant A, given that the owner finds that it is defective, is 0.67 or 67%.

Let A be the event that the tire comes from plant A, and D be the event that the tire is defective. We want to find P(A|D), the probability that the tire comes from plant A, given that it is defective.

Using Bayes' theorem, we have:

P(A|D) = P(D|A) * P(A) / P(D)

We know that P(D|A) = 0.20, the probability that a tire from plant A is defective, and P(D|B) = 0.10, the probability that a tire from plant B is defective.

We also know that P(A) = P(B) = 0.50, the probability that an order consists of tires from plant A or plant B.

To find P(D), we use the law of total probability:

P(D) = P(D|A) * P(A) + P(D|B) * P(B)

= 0.20 * 0.50 + 0.10 * 0.50

= 0.15

Now we can substitute these values into Bayes' theorem:

P(A|D) = P(D|A) * P(A) / P(D)

= 0.20 * 0.50 / 0.15

= 2/3

= 0.67 (rounded to two decimal places)

Therefore, the probability that a tire is from plant A, given that the owner finds that it is defective, is 0.67 or 67%.

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Answer:

Step-by-step explanation:

Negtive 1

Negtive 2

Negtive 3

Negtive 4

Answer: you would have a 75% chance

The value of f in the proportion is,

f = 20

We have to given that;

Proportion is,

⇒ 5 / 11 = f / 44

Now, We can simplify as;

⇒ 5 / 11 = f / 44

⇒ 5 x 44 / 11 = f

⇒ 5 x 4 = f

⇒ f = 20

Thus, The value of f in the proportion is,

f = 20

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The value of f from 5/11 = f/44 is 20.

We have,

5 /11 = f /44

Using proportion we get

5 x 44 = 11 x f

5 x 44 /11 = f

5 x 4 = f

f = 20

Thus, the value of f is 20.

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The sample proportion of insomnia sufferers who did not enjoy a better night's sleep after the therapy is 0.694 (rounded to three decimal places).

We calculate the sample proportion of insomnia sufferers who did not enjoy a better night's sleep after the therapy. Here are the steps to find the answer:

1. Determine the total number of participants in the study (n): 72 insomnia sufferers.
2. Determine the number of participants who enjoyed a better night's sleep after the therapy: 22 participants.
3. Subtract the number of participants who enjoyed a better night's sleep from the total number of participants to find the number of participants who did not enjoy a better night's sleep: 72 - 22 = 50 participants.
4. Calculate the sample proportion (p) of insomnia sufferers who did not enjoy a better night's sleep after the therapy by dividing the number of participants who did not enjoy a better night's sleep by the total number of participants: p = 50 / 72.
5. Round the answer to three decimal places, if necessary: p ≈ 0.694.

Your answer: The sample proportion of insomnia sufferers who did not enjoy a better night's sleep after the therapy is approximately 0.694.

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From the principal mathematical induction, the inequality, 2ⁿ > n², where n belongs to integers, is true for all integers greater than four, i.e., n > 4.

We have to prove the inequality 2ⁿ > n², for all integer greater than 4. For this we use mathematical induction method. The principle of mathematical induction is one of method used in mathematics to prove that a statement is true for all natural numbers.

Step 1 : first we consider case first for n= 5 , here 2⁵ = 32 and 5² = 25, so 2⁵ > 5²

Thus it is true for n = 5.

Step 2 : Now suppose it's true for some integer k such that n≤ k, that is 2ᵏ > k²--(1)

Step 3 : Now, we have to prove it's true for n = k + 1. So, 2ᵏ⁺¹ = 2ᵏ. 2

2ᵏ⁺¹ = 2ᵏ.2 > 2k² ( since, 2ᵏ > k² )

> 2k² = k² + k²

> k² + 2k + 1 ( since, k² > 2k + 1 ,k > 3)

> ( k +1)² = k² + 2k + 1

=> 2ᵏ⁺¹ > (k+1)²

So, we proved it for n = k + 1. Hence, this theorem is true for all n.

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To compute the values of Ox and Oy required to cause the given deformations, we can use the following equations:

εx = (1/E) * (σx - v*σy)
εy = (1/E) * (σy - v*σx)

Where εx and εy are the strains in the x and y directions, σx and σy are the stresses in the x and y directions, E is the modulus of elasticity, and v is the Poisson's ratio.

We can assume that the plate is subjected to equal and opposite stresses in the x and y directions, such that σx = -σy = σ. Therefore, we can write:

εx = (1/E) * (σ + v*σ) = (1/E) * (1+v) * σ
εy = (1/E) * (-σ + v*σ) = (1/E) * (v-1) * σ

Using the given dimensions and deformations, we can calculate the strains:

εx = ΔLx/Lx = 0.0016/8 = 0.0002
εy = -ΔLy/Ly = -0.00024/4 = -0.00006

Substituting these values into the equations above, we can solve for σ and then for Ox and Oy:

σ = (εx * E)/(1+v) = (0.0002 * 29e6)/(1+0.30) = 4795 psi

Ox = σ*t = 4795 * 8 = 38360 lb/in
Oy = -σ*t = -4795 * 4 = -19180 lb/in

Therefore, the values of Ox and Oy required to cause the given deformations are 38360 lb/in and -19180 lb/in, respectively.

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