the average age of community college students is 24.6 years. state the null and alternative hypothesis

Answer:

50.6°

Step-by-step explanation:

complementary angles sum to 90° , that is

complementary angle + 39.4° = 90° ( subtract 39.4° from both sides )

complementary angle = 90° - 39.4° = 50.6°

The probability that a randomly selected student score more than 80 points is 0.1587 or 15.87%. The lowest eligible for an award is 85.76.

To find the probability that a randomly selected student scores more than 80 points, we need to standardize the score using the z-score formula:

z = (x - μ) / σ

where x is the score

μ is the mean

σ is the standard deviation.

In this case, we have:

z = (80 - 74) / 6 = 1

Using a standard normal distribution table or calculator, we can find that the probability of a z-score of 1 or greater is approximately 0.1587. Therefore, the probability that a randomly selected student scores more than 80 points is approximately 0.1587 or 15.87%.

To find the lowest score eligible for an award, we need to find the z-score that corresponds to the top 2.5% of the distribution. Using a standard normal distribution table or calculator, we can find that the z-score corresponding to the top 2.5% is approximately 1.96.

We can then use the z-score formula to solve for x:

z = (x - μ) / σ

1.96 = (x - 74) / 6

11.76 = x - 74

x = 85.76

Therefore, the lowest score eligible for an award is approximately 85.76.

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The solution to the given set of equations is, No solution.

We have to given that;

A set of equations is given below:

Equation C: y = 6x + 9

Equation D: y = 6x + 2

Now, We can see that;

y = 6x + 9

y = 6x + 2

Equate both equations, we get;

6x + 2 = 6x + 9

2 ≠ 9

Hence, We get;

The solution to the given set of equations is, No solution.

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The length of the two diagonals of a rhombus if one is twice as long as the other are 10 and 20.

Given that the length of two diagonals of the rhombus are 10 and 20.

Let d1 and d2 be the lengths of the diagonals of the rhombus. Since the area of the rhombus is 100, we have:

d1 * d2 / 2 = 100

We are also given that one diagonal is twice as long as the other, so:

d1 = 2d2

Substituting d1 = 2d2 into the first equation, we get:

2d2 * d2 / 2 = 100

d2^2 = 100

d2 = 10 or -10 (we ignore the negative solution)

Since d1 = 2d2, we have d1 = 20.

Therefore, the length of the two diagonals of the rhombus are 10 and 20.

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The function graphed below is is described as.

D. not continuous, 2 holes

When we speak of "holes" in the realm of continuous functions, it implies a spot wherein said function is not defined yet can become continuous once it has been allotted an appropriate value.

Examining the graph shows the presence of two holes hence making option D the best choice

The holes ate located at points

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If the arrow lands on yellow you win $75, blue gives $25, green gives $10, and red gives $1. The expected value of the game is $27.75, written as a decimal rounded to two places.

To find the expected value of the game, we need to multiply the value of each piece by the probability of landing on that piece, and then add up all the products.

First, let's determine the probability of landing on each colored piece of the wheel. Since each piece is equally likely, we can find the probability by dividing 1 by the number of pieces.
There are 4 colors on the wheel (yellow, blue, green, and red), so the probability of landing on any color is 1/4 or 0.25.
Now, let's calculate the expected value of the game:

Expected Value = (Probability of Yellow) × (Value of Yellow) + (Probability of Blue) × (Value of Blue) + (Probability of Green) × (Value of Green) + (Probability of Red) × (Value of Red)

The probability of landing on yellow is 1/4, so the value of yellow is $75.

The probability of landing on blue is also 1/4, so the value of blue is $25.

The probability of landing on the green is 1/4, so the value of green is $10.

The probability of landing on red is also 1/4, so the value of red is $1.

Now we can calculate the expected value:

Expected value = (1/4) x $75 + (1/4) x $25 + (1/4) x $10 + (1/4) x $1
Expected value = $18.75 + $6.25 + $2.50 + $0.25
Expected value = $27.75

So the expected value of the game is $27.75. Written as a decimal rounded to two places, the answer is $27.75.

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The matrix of constants you provided [[12],[11],[4]] represents a system of linear equations with 3 variables and 1 equation, which is an underdetermined system.

To write the system of equations in the form Ax = b, where A is the matrix of coefficients, x is the vector of variables, and b is the vector of constants, we can set:

12x1 = 11x2 + 4x3

where x1, x2, and x3 are the variables of the system.

Note that this system has infinitely many solutions, since there are more variables than equations. In other words, we can choose any value for one of the variables and solve for the other two.

Assuming that you meant to ask for the simplified form of the expression:

The formula is (a × x) = (a × x) + (b × a × x)

We can first simplify the expression by combining like terms:

(1 + 4b) is equal to (axe) + b(ax) + c(a × x) + d(a × x)√(ax)

Therefore, the simplified expression is:

(1 + 4b)√()axe) + b(ax) + c(a × x) + d(a × x)√(ax)

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9 5/2 in radical form is equal to 4√2 + √7.

We are able to rewrite 9 5/2 in radical form through first changing it to an improper fraction.

9 5/2 = (9 x 2 + 5) / 2 = 23/2

Now, we can express 23/2 as a mixed radical by using locating the largest perfect square that may be a aspect of 23. the largest perfect square which is much less than 23 is 16 (that's 4^2).

So, we are able to write:

23/2 = 16/2 + 7/2 = 8 + 7/2

Now, we will express 8 + 7/2 in radical form as:

8 + 7/2 = 4 x 2 + 7/2 = 4√2 + √7

Consequently, 9 5/2 in radical form is equal to 4√2 + √7.

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According to the figure, the arc lengths are

The missing sides in the figure are sought knowing that central angles are equal to length of arcs. Hence we have that

arc CE = 180 degrees - arc CA

arc CE = 180 degrees - 50 degrees

arc CE = 130 degrees

arc DE = arc CA (vertical angles)

arc DE = 50 degrees

arc FAE = 360 degrees - 90 degrees

arc FAE = 270 degrees

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The inverse of f(x) is: [tex]f^{-1(x)}[/tex] = (x - 8)/5 switched the variables, so instead of [tex]f^{-1(x)}[/tex] , we wrote it as [tex]f^{-1(x)}[/tex] .

What is function?

In mathematics, a function is a relationship between two sets of elements, called the domain and the range, such that each element in the domain is associated with a unique element in the range.

To find the inverse of the function f(x) = 8 + 5x, we need to solve for x in terms of f(x).

Let y = f(x) = 8 + 5x

To find the inverse, we need to isolate x on one side of the equation:

y = 8 + 5x

y - 8 = 5x

x = (y - 8)/5

Therefore, the inverse of f(x) is:

[tex]f^{-1(x)}[/tex] = (x - 8)/5

Or, we can write it as:

[tex]f(x)^{-1}[/tex] = (x - 8)/5

Note that we switched the variables, so instead of [tex]f^{-1}[/tex] , we wrote it as [tex]f^{-1(x)}[/tex] .

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The number of people expected to go to the Youth Wing, would be 255 people.

Find the total amount of people who will be visiting on Saturday:

= 382 ( Youth Wing ) + 461 ( Social Issues ) + 355 ( Fiction and Literature )

= 1, 198

Then the proportion of those who went to Youth Wing :

= 382 / 1, 198

= 0. 319

The estimated people going for Youth Wing on Sunday :

= 0. 319 x 800

= 255 people

In conclusion, an estimated 255 people would be going to Youth Wing.

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If by the baking of 81 muffins, the baker has completed 37.5% of the order. The customer placed an order for 216 muffins.

Percent refers to the ratio of numbers where the denominator is 100. The percentage of a given number is calculated as the percentage divided by 100 and multiply the given number.

Percentage of baked muffins = 37.5%

Number of the baked muffin = 81

Let the number of muffins ordered be x

37.5% of x = 81

37.5/100 * x = 81

0.375x = 81

x = 81/0.375

x = 216

Thus, 216 muffins were ordered by the customer.

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The inequality Ellen’s graph shows the solution to is, Negative 3.25 less-than negative 2.5 + r, the correct option is C.

Here, we have,

An Inequality is a statement that is formed when two expressions are joined using an inequality operator.

A number line is a line segment that depicts the real numbers marked at a fixed distance, like a coordinate axis.

A graph is a representation of the relation between two variables, a graph is useful in determining the equation of the variables.

A number line going from negative 1.25 to positive 0.75. An open circle is at negative 0.75, everything to the left of the circle is shaded.

An open circle represents the number that is not included.

x < -0.75

x < -3.25 +2.5

x -2.5 < 3.25

It can also be written as,

Negative 3.25 less-than negative 2.5 + r.

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complete question;

Ellen drew a graph showing the solution to an inequality.

A number line going from negative 1.25 to positive 0.75. An open circle is at negative 0.75. Everything to the left of the circle is shaded.

Which inequality does Ellen’s graph show the solution to?

3.25 less-than 2.5 + r

3.25 greater-than 2.5 + r

Negative 3.25 less-than negative 2.5 + r

Negative 3.25 greater-than negative 2.5 + r

The percent chance that the ball you draw is white is 70%.

To find the percent chance of drawing a white ball, we will calculate the probability and then convert it into a percentage.

1. First, determine the total number of balls in the bag: 7 white balls + 3 red balls = 10 balls.
2. Next, determine the number of favorable outcomes, which is the number of white balls: 7 white balls.
3. Calculate the probability by dividing the number of favorable outcomes by the total number of balls: 7 white balls ÷ 10 balls = 0.7.
4. Convert the probability to a percentage by multiplying it by 100: 0.7 x 100 = 70%.

So, the percent chance that the ball you draw is white is 70%.

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We have to show that the surface area of the solid region bounded by the three cylinders x^2 + y^2 = 1, y^2 + z^2 = 1, and x^2 + z^2 = 1 is 48 - 24√2

Step 1: Find the points of intersection between the cylinders.
By solving the systems of equations:
 (i) x^2 + y^2 = 1 and y^2 + z^2 = 1
 (ii) x^2 + y^2 = 1 and x^2 + z^2 = 1
 (iii) y^2 + z^2 = 1 and x^2 + z^2 = 1

Step 2: Calculate the surface areas of the three cylinders within the bounded region.
The surface area of each cylinder can be found using the formula A = 2πrh, where r is the radius, and h is the height.

Step 3: Add the surface areas of the three cylinders.
Sum the surface areas found in step 2 to get the total surface area of the bounded region.

Step 4: Subtract the overlapping areas.
The overlapping areas are the 6 faces of the solid octahedron formed by the intersection of the cylinders. Each face has an area of √2/2, so the total overlapping area is 6(√2/2).

Step 5: Calculate the final surface area.
Subtract the overlapping areas found in step 4 from the total surface area found in step 3 to obtain the final surface area.

Upon completing these steps, you will find that the surface area of the solid region bounded by the three cylinders x^2 + y^2 = 1, y^2 + z^2 = 1, and x^2 + z^2 = 1 is indeed 48 - 24√2.

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Answer:

-1

Step-by-step explanation:

4x + 13 = 9

4x + 13 - 13 = 9 -13

4x = -4

-4/4 = -1

X = -1

Answer:

-1.

Step-by-step explanation:

4x + 13 = 9

4x =  9 -13

4x = -4

x = -4/4

X = -1

The PDF of T1 is:

f(T1) = d/dt [P(T1 ≤ t)] = d/dt [1 - P(T1 > t)] = d/dt [1 - P(N(t) = 0)] = d/dt [1 - e^(-Lt)] = L * e^(-Lt)

So the PDF of T1 is an exponential distribution with parameter L.

To find the PDF of T1, we need to find the probability that the first event occurs at time t given that it has not occurred before time t. That is, we need to find P(T1 = t | N(t) = 0).

Using Bayes' rule, we have:

P(T1 = t | N(t) = 0) = P(N(t) = 0 | T1 = t) * P(T1 = t) / P(N(t) = 0)

Since T1 is the arrival time of the first event, we know that there are no events in the interval [0, t), so we can write:

P(N(t) = 0 | T1 = t) = P(N(t - T1) = 0)

Since {N(t) : t ≥ 0} is a conditional Poisson process with rate L that is distributed as Exp(λ), we know that the number of events in any interval of length t has a Poisson distribution with mean L*t. Therefore, the probability that there are no events in an interval of length t is:

P(N(t) = 0) = e^(-L*t)

So we can write:

P(T1 = t | N(t) = 0) = P(N(t - T1) = 0) * P(T1 = t) / e^(-L*t)

The probability density function (PDF) of the exponential distribution with parameter λ is given by:

f(x) = λ * e^(-λ*x)

Therefore, the PDF of T1 is:

f(T1) = d/dt [P(T1 ≤ t)] = d/dt [1 - P(T1 > t)] = d/dt [1 - P(N(t) = 0)] = d/dt [1 - e^(-Lt)] = L * e^(-Lt)

So the PDF of T1 is an exponential distribution with parameter L.

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Answer:

8.5 ounces.

Step-by-step explanation:

The volume of the conical cup is given by the formula V = (1/3)πr²h, where r is the radius and h is the height. Since the diameter of the cup is 3 inches, the radius is 1.5 inches. Thus, the volume of the conical cup is:

V = (1/3)π(1.5²)(3) = 7.07 cubic inches

The volume of the cylindrical cup is given by the formula V = πr²h. Since the radius is 1.5 inches and the height is 3 inches, the volume of the cylindrical cup is:

V = π(1.5²)(3) = 21.2 cubic inches

To find the weight of the water in each cup, we need to multiply the volume of each cup by the weight of 1 cubic inch of water:

Weight of water in conical cup = 7.07 × 0.6 = 4.24 ounces

Weight of water in cylindrical cup = 21.2 × 0.6 = 12.72 ounces

Therefore, the water in the cylindrical cup weighs 12.72 - 4.24 = 8.48 more ounces than the water in the conical cup. Rounded to the nearest tenth, this is 8.5 ounces.

Since there is no way to list all the infinite sequences of 0s and 1s, we have proved that S is uncountable.

To show that S is uncountable, we need to show that there is no one-to-one correspondence between the set of infinite sequences of 0s and 1s and the set of natural numbers (which are used to count elements in a set).
We can use the diagonal argument, which is similar to the one used to show that the real numbers are uncountable.
Assume that S is countable, meaning that there is a way to list all the infinite sequences of 0s and 1s as a sequence: s1, s2, s3, ...
We can construct a new sequence t by choosing the opposite of each digit on the diagonal of the previous sequences: if the diagonal digit of s1 is 0, then the first digit of t is 1, and vice versa. Similarly, if the diagonal digit of s2 is 1, then the second digit of t is 0, and vice versa. And so on for all the diagonal digits.
The sequence t is guaranteed to be different from all the sequences in the original list, because it differs from each sequence at least at one position (the diagonal position). Therefore, t cannot be in the original list, which means that the original list did not include all the infinite sequences of 0s and 1s.
Since we have shown that there is no way to list all the infinite sequences of 0s and 1s, we have proved that S is uncountable.

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The probability that Chris will choose a pair of white socks is 0.75 or 75%.

Chris has a total of 2 + 4 + 18 = 24 pairs of socks in his drawer. Out of these, 18 pairs are white.

Probability is a branch of mathematics that deals with the study of random events or phenomena. It is concerned with measuring the likelihood or chance of an event occurring.

In probability theory, an event is any outcome or set of outcomes of a random experiment. The probability of an event is a number between 0 and 1 that represents the likelihood of that event occurring. An event with a probability of 0 is impossible, while an event with a probability of 1 is certain.

If Chris reaches in his drawer without looking and selects a pair of socks at random, the probability of choosing a pair of white socks is:

(number of pairs of white socks) / (total number of pairs of socks)

= 18 / 24

= 3/4

= 0.75

Therefore, the probability that Chris will choose a pair of white socks is 0.75 or 75%.

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The drive-thru that typically has more wait time, and why is C. Super Fast Food, because it has a larger median

According on the information supplied, Super Fast Food normally has a greater wait time. Although the Burger Quick box is larger, indicating a greater range of wait times, the median (15.5) is still lower than the Super Fast Food (12).

Furthermore, the Burger Quick line ends at 30, indicating that there are some extreme outliers with extremely long wait times, which could raise the mean wait time. As a result, the correct answer is Super Fast Food, which has a higher median.

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In this scenario, there are two workers in a team, and each worker can either work hard or shirk. The probability of the overall project succeeding is dependent on the efforts of each worker. If both workers shirk, the probability of success is p0. If one worker shirks and the other works hard, the probability of success is p1. Finally, if both workers work hard, the probability of success is p2, where p2>p1>p0.

The cost of effort is c, and the principal cannot observe the individual efforts of each worker, but only the success or failure of the whole project. The challenge is to design an optimal contract that encourages both workers to exert effort all the time.

The optimal contract would offer a payment scheme to both workers that would incentivize them to work hard. If the workers work hard and the project succeeds, they receive a reward. If the workers shirk, they receive no reward.

The workers' efforts in this scenario are substitutes for each other. This is because if one worker shirks, the probability of success decreases, and the other worker would have to work harder to compensate for the first worker's lack of effort. Therefore, both workers must work hard to maximize the probability of success.

In conclusion, an optimal contract must be designed that encourages both workers to work hard and rewards them for the successful completion of the project. Additionally, the efforts of both workers in this scenario are substitutes for each other.

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Answer: 17/25 miles per hour

Step-by-step explanation:

In order to find your answer, you will need to divide 3 and 2/5 by 5 hours

or (3.4/5) which equals 0.68.

As a fraction, 0.68 is 17/25 which is your answer :)

And if you want to check your work, simply multiply 0.68 x 5 and you get 3.4 (which is 3 and 2/5's)!

Good Luck!

Answer:1/2

Step-by-step explanation:

If they both ate 2/8 of the pie, that means they ate 4/8 of the pie in total, which means that they ate 1/2 when simplified. If they ate one half of the pie, it also means there is 1/2 of the pie left.

The total sample size, because each pair of data provides one less degree of freedom than the number of individuals in the pair.

The formula used to calculate the degrees of freedom for a test for dependent groups is:

df = n - 1

where n is the number of pairs of data in the sample.

In a dependent groups (or paired samples) test, the same group of individuals is measured twice, or two groups of individuals are matched in pairs. The difference between the two measurements or the two pairs of measurements is the data used in the test.

The degrees of freedom is a measure of the amount of information available to estimate a population parameter, such as the mean difference between the paired observations in the case of a dependent groups test. In general, a higher degrees of freedom value means more information and thus more precision in the estimate.

In the case of a dependent groups test, the degrees of freedom is determined by the number of pairs of data in the sample, rather than the total sample size, because each pair of data provides one less degree of freedom than the number of individuals in the pair.

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The value of x is 19.44

Similar triangles are triangles that have the same shape, but their sizes may vary.

For two triangles to be similar, the corresponding angles must be congruent and also, the ratio of the corresponding sides of similar triangles are equal,

therefore,

27/9x-13 = 15/90

27 × 90 = 15(9x-13)

2430 = 135x - 195

collecting like terms

2430+195 = 135x

2625 = 135x

divide both sides by 135

x = 2625/135

x = 19.44

therefore the value of x is 19.44

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The null hypothesis is that the proportion of people who would still vote for the government of Preon is still 67%, while the alternative hypothesis is that the proportion has changed from 67%.

The null hypothesis (H0) is that the proportion of people who would still vote for the government of Preon is still 67%, as it was at the last election.

The alternative hypothesis (H1) is that the proportion of people who would still vote for the government of Preon has changed from 67%, either increased or decreased.

In symbols, this can be written as:

H0: p = 0.67

H1: p ≠ 0.67

Where p is the proportion of people who would vote for the government of Preon in the upcoming election.

Note that the alternative hypothesis is two-tailed, indicating that the proportion could have either increased or decreased from 67%.

This is because the government suspects that their approval rating may have changed in either direction.

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The translations of the functions are as follows

Reflection

Shift Right

Shift Up

Vertical Stretch: the coefficient of  the factor x when it is greater than one results to vertical stretch

Shift Left: this is translation of 3 units left

Vertical Shrink: the coefficient of  the factor x when it is less than one results to vertical shrink

Shift Left: this is translation of 2 units left

Vertical Stretch: the coefficient of  the factor x when it is greater than one results to vertical stretch. in this case 3/2 = 1.5 which is greater than one.

Shift Left: this is translation of 5 units left

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The explicit rule for sequence 3200,1600,800, 400,... is aₙ = 3200(1/2)⁽ⁿ⁻¹⁾, the explicit rule for sequence 12, 84, 588, 4116, .. is aₙ = 12(7)⁽ⁿ⁻¹⁾, the explicit rule for sequence 1395, 465, 155, 51.67,... is aₙ = 1395(1/3)⁽ⁿ⁻¹⁾.

The common ratio in this geometric sequence is 1/2. Thus, the explicit rule for this sequence is given by

aₙ = 3200(1/2)⁽ⁿ⁻¹⁾

where aₙ represents the nth term of the sequence.

This sequence appears to be a geometric sequence where the common ratio is 7. Thus, the explicit rule for this sequence is

aₙ = 12(7)⁽ⁿ⁻¹⁾

where aₙ represents the nth term of the sequence.

This sequence appears to be a geometric sequence where the common ratio is 1/3. Thus, the explicit rule for this sequence is

aₙ = 1395(1/3)⁽ⁿ⁻¹⁾.

where aₙ represents the nth term of the sequence.

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Demand refers to the quantity of a product or service that buyers are willing and able to purchase at a certain price level. A demand curve is a graphical representation of the relationship between the quantity of a good or service that buyers are willing to purchase at different price levels.

In the market for VCRs, the demand and supply equations are Qd = 1,000 - 6P and Qs = 4P respectively. The government decides to impose a tax of $30 per unit sold on VCRs. This will lead to a shift in the supply curve upwards by $30, resulting in a new equilibrium point.

1. To find the new equilibrium quantity with the tax, we set Qd = Qs + tax. Thus, 1,000 - 6P = 4P + 30. Solving for P, we get P = $105. The equilibrium quantity is therefore Q = 1,000 - 6($105) = 370.

2. The price paid by buyers is the same as the equilibrium price, which is $105.

3. The price paid by sellers is the equilibrium price minus the tax, which is $75.

4. The diagram below illustrates the impact of the tax on the market for VCRs. The original equilibrium point is E0, with a price of $70 and a quantity of 400. With the tax, the new equilibrium point is E1, with a higher price of $105 and a lower quantity of 370. The tax creates a vertical distance between the two equilibrium points, which represents the tax revenue collected by the government.

[Insert Diagram Here]

5. The deadweight loss due to the tax is the reduction in total surplus (consumer surplus + producer surplus) that results from the tax. Using the original equilibrium as a benchmark, the total surplus is (1/2)($70)(400) = $14,000. With the tax, the total surplus is (1/2)($75)(340) = $6,375. Thus, the deadweight loss is $7,625.

6. To calculate the consumer surplus due to the tax, we need to compare the original consumer surplus with the new consumer surplus. Using the original equilibrium as a benchmark, the consumer surplus is (1/2)($70)(400 - 70) = $5,950. With the tax, the consumer surplus is (1/2)($105)(370 - 105) = $12,145. Thus, the consumer surplus due to the tax is $6,195.

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