A random sample of 13 $1 Trifecta tickets at a local racetrack paid a mean amount of $52. 23 with a sample standard deviation of $3. 35. Is there sufficient evidence to conclude that the average Trifecta winnings exceed $50? Use a 10% significance level and assume the distribution is approximately normal.



What is the critical value?

To determine the convergence of the integral 4(1-z)/(2^2 +1)² dz from 0 to infinity, we can use the comparison test.

First, note that (1-z) is bounded between 0 and 1, so we can compare it to the integral of 4/(2² +1)² dz from 0 to infinity, which is convergent since it is a constant times the convergent p-series with p=2.

Therefore, by the comparison test, the original integral is also convergent. To evaluate it, we can use partial fractions:

4(1-z)/(2² +1)^2 = A/(2+i)² + B/(2-i)²

Solving for A and B, we get A = (1+i)/5 and B = (1-i)/5.

Then, the integral becomes:

∫ 4(1-z)/(2² +1)² dz = A ∫ 1/(2+i)² dz + B ∫ 1/(2-i)² dz

= (1+i)/5 [-1/(2+i)] + (1-i)/5 [-1/(2-i)] from 0 to infinity

= [(1+i)(2-i) - (1-i)(2+i)]/25(2² +1)

= 0

Therefore, the integral is convergent and evaluates to 0.

To determine if an integral is convergent or divergent, you need to look at its limits and the function you are integrating. Convergent means that the integral has a finite value, while divergent means the integral does not have a finite value.

For example, if you have an integral like this:

∫(f(x) dx) from a to b,

you need to evaluate the limits 'a' and 'b' and the function 'f(x)'. If 'a' or 'b' is infinity (∞) or the function 'f(x)' behaves such that it leads to an infinite value for the integral, it is divergent. Otherwise, it is convergent.

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The equation is 86.25 + 3x = 99.

Let's assume the cost for each hour Troy's car was parked in the garage is x dollars.

Since Troy spent a total of $99, we can set up an equation based on the given information.

The cost of the ticket to the basketball game is $86.25, and Troy also had to pay for 3 hours of parking. Therefore, the equation can be written as:

86.25 + 3x = 99

In this equation, 86.25 represents the cost of the ticket, 3x represents the cost of parking for 3 hours at a rate of x dollars per hour, and 99 represents the total amount Troy spent.

Therefore, the equation is 86.25 + 3x = 99.

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Booker bought 8 servings of almonds.

One serving of almonds is equal to 1/3 cup.

To find how many servings of almonds Booker bought, we can divide the total amount of almonds he purchased by the amount in one serving:

2 and 2/3 cups of almonds = 8/3 cups of almonds

Number of servings = (total amount of almonds purchased) / (amount in one serving)

Number of servings = (8/3) / (1/3)

Number of servings = 8/3 x 3/1

Number of servings = 8

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The probability that the next contestant will win a prize is 2/5.

What is probability?

Probability is a way of calculating how likely something is to happen. It is difficult to provide a complete prediction for many events. Using it, we can only forecast the probability, or likelihood, of an event occurring. The probability might be between 0 and 1, where 0 denotes an impossibility and 1 denotes a certainty.

Experimental probability is based on the result of an experiment that has been carried out multiples times.

probability that the next contestant will win a prize = number of contestants that won in the last games / total number of contestants in the last games

=> 8/20

To transform to the simplest form. divide both the numerator and the denominator by 4

=> 2/5

Hence the probability that the next contestant will win a prize is 2/5.

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Using an equation, if Nancy worked alone, the number of hours it would take her to complete the birthday cake is 1 hour 30 minutes.

An equation is a mathematical statement that proves the equality or equivalence of two or more mathematical expressions.

Equations use the equal symbol (=) unlike algebraic expressions, which combine variables with numbers, constants, and values using mathematical operands.

The number of hours for Vanessa and Nancy working together to make a birthday cake = 2 hours

The number of hours it takes Vanessa to complete the cake working alone = x

The number of hours it takes Nancy to complete the cake alone = 3x

3x + x = 2

4x = 2

x = 0.5 = 30 minutes

The total time for Nancy to complete the cake = 3x = 1.5 (3 x 0.5)

= 1 hour 30 minutes

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[tex]\sf Let \ d_1 \ and \ d_2 \ be \ the \ lengths \ of \ the \ sides \ of \ diagonals.[/tex]

[tex]\sf Given \ that \ d_1=8 \ cm[/tex]

[tex]\sf And \ d_2=10 \ cm[/tex]

[tex]\therefore\sf Area \ of \ rhombus=\dfrac{1}{2} (d_1)(d_2)=\dfrac{1}{2}(8)(10)=40 \ cm^2[/tex]

[tex]\rightarrow\boxed{\sf Area \ of \ rhombus=40 \ cm^2}[/tex]

The substitution (3x - 2)2 u = 3x - 2 transforms the indefinite integral da into none of the given options. It should result in the integral of the function being expressed in terms of u rather than x.

This substitution is an example of using a change of variables to simplify an integral by transforming it into a more manageable form. This can be particularly useful when dealing with complicated integrals that are difficult to solve by other methods. Additionally, using such transforms can often provide insight into the underlying structure of the problem being studied.
 Based on your question, it appears that you want to perform a substitution to transform the indefinite integral of "da" using the substitution (3x - 2)² u = 3x - 2. However, the given integral "da" doesn't seem to be correct or complete. Please provide the complete integral, and I will be happy to help you with the transformation using the given substitution.

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Answer:

True (I think)

Step-by-step explanation:

Same pattern.

A -> B -> C.

D -> E -> F.

Would be false if either one didn't share the same pattern.

The area inside the square and outside the circle is 0.86 square units.

To find the area inside the square and outside the circle, we need to first find the area of the square and the area of the circle.

Let's assume that the square has sides of length 2 units, which means its area is:

Area of square = side^2 = 2^2 = 4 square units

Now, let's assume that the circle has a radius of 1 unit, which means its area is:

Area of circle = pi * radius^2 = 3.14 * 1^2 = 3.14 square units

To find the area inside the square and outside the circle, we need to subtract the area of the circle from the area of the square:

Area inside square and outside circle = Area of square - Area of circle

                                     = 4 - 3.14

                                     = 0.86 square units

Therefore, the area inside the square and outside the circle is 0.86 square units.

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Answer:

A (35%)

Step-by-step explanation:

Just divide what you want to find with the total. Does not have chocolate = 7. Total Lime = 20 (13 + 7) 7/20 = 0.35/35%

The radius of the circle of equation x² + y² = 19² is given as follows:

r = 19 units.

The equation of a circle of center [tex](x_0, y_0)[/tex] and radius r is given by:

[tex](x - x_0)^2 + (y - y_0)^2 = r^2[/tex]

The radius of a circle represents the distance between the center of the circle and a point on the circumference of the circle.

The equation of the circle in this problem is given as follows:

x² + y² = 19².

Hence the radius is obtained as follows, comparing to the general equation:

r² = 19²

r = 19 units.

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The random variable in the first situation is the number of hits for the players of a baseball team and in the second situation is the distance traveled by the tee shots in a golf game.

1) The random variable in this distribution is the number of hits for the players of a baseball team. This is a discrete random variable because hits are counted as whole numbers and cannot take on non-integer values.

2) The random variable in this distribution is the distance traveled by the tee shots in a golf game. This is a continuous random variable because the distances traveled can take on any value within a certain range, including non-integer values. The exact distance traveled by a tee shot can be measured to any degree of precision, and there are infinitely many possible distances within the range of possible outcomes. Therefore, it is a continuous random variable.

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When the diameter of the balloon is 50 cm, the radius of the balloon is increasing at a rate of approximately 0.0254 cm/s

We are given that the volume of a spherical balloon is increasing at a rate of 100 cm³/s. We need to find how fast the radius of the balloon is increasing when the diameter is 50 cm.

Let's first find the expression for the volume of the balloon in terms of its radius.

V = 4/3 πr³

Differentiating with respect to time (t), we get:

dV/dt = 4πr² (dr/dt)

We are given that dV/dt = 100 cm³/s. When the diameter of the balloon is 50 cm, the radius is 25 cm.

Substituting these values, we get:

100 = 4π(25)² (dr/dt)

Simplifying, we get:

dr/dt = 100 / (4π(25)²)

dr/dt ≈ 0.0254 cm/s

Therefore, when the diameter of the balloon is 50 cm, the radius of the balloon is increasing at a rate of approximately 0.0254 cm/s

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Answer:

30 cm²

Step-by-step explanation:

Formula : [tex]Area = \frac{hb}{2}[/tex]

The area of the shaded region of the circle is A = 57,918.5 feet²

Given data ,

First, we need to find the area of the quarter circle:

Area of quarter circle = (1/4)  π ( r )²

= (1/4)  π ( 290 )²

= 66,018.5 feet²

Next, we need to find the area of the square:

Area of square = side²

= 90²

= 8,100 feet²

Now, we can find the area of the shaded section by subtracting the area of the square from the area of the quarter circle:

Area of shaded section = Area of quarter circle - Area of square

= 66,018.5 feet² - 8,100 feet²

= 57,918.5 feet²

Hence , the area of the shaded section of the field is 57,918.5 feet²

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Part A: The equation that describes the amount of music stands and songs that the band club can purchase is 15x + 350y = 2100.

Part B: The greatest number of music stands the club can buy is 6, and the greatest number of songs the club can buy is 3.

Part A:

The cost of x music stands is 15x dollars, and the cost of y songs is 350y dollars. The total cost cannot exceed $2,100, so we can write the following equation:

15x + 350y = 2100

Therefore, the equation that describes the amount of music stands and songs that the band club can purchase is 15x + 350y = 2100.

Part B:

To find the greatest number of each item the club can buy, we can use the given equation and look for integer solutions for x and y that satisfy the equation.

We can rearrange the equation to solve for y:

y = (2100 - 15x) / 350

To get integer solutions for y, we need 2100 - 15x to be divisible by 350. The largest multiple of 350 that is less than or equal to 2100 is 6*350 = 2100. So, we can try x = 0, 1, 2, 3, ..., 6 and see which values give integer solutions for y.

When x = 0, y = 6, which is an integer solution.

When x = 1, y = 5, which is not an integer solution.

When x = 2, y = 4, which is not an integer solution.

When x = 3, y = 3, which is an integer solution.

When x = 4, y = 2, which is not an integer solution.

When x = 5, y = 1, which is not an integer solution.

When x = 6, y = 0, which is an integer solution.

So, the greatest number of music stands the club can buy is 6, and the greatest number of songs the club can buy is 3.

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Ishaan's current age is 84.

Let Ishaan's current age be I and Christopher's current age be C.

Given, I = 2C ...........(1) (Ishaan is twice the age of Christopher)

35 years ago, I - 35 = 7(C - 35) (Ishaan was 7 times the age of Christopher 35 years ago)

Simplifying the above equation, we get:

I - 35 = 7C - 245

I = 7C - 210 ...........(2)

Substituting equation (1) in equation (2), we get:

2C = 7C - 210

5C = 210

C = 42

Therefore, Christopher's current age is 42.

Substituting C = 42 in equation (1), we get:

I = 2C = 2(42) = 84

Therefore, Ishaan's current age is 84.

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The question is translated to English as

Ishaan is twice the age of Christopher. 35 years ago Ishaan was 7 times the age of Christopher. How old is Ishaan now?

Peter will need 60 square inches of gold paper to cover the entire square pyramid for his History class.

You need to find the total surface area of the square pyramid that Peter creates for his History class to determine how much gold paper he will need. This can be done as follows.

1: Identify the given information.

Base area: 20 square inches

Triangle area: 10 square inches

2: Determine the number of triangles in a square pyramid.

A square pyramid has 4 triangular faces.

3: Calculate the total area of the triangular faces.

Multiply the area of one triangle by the number of triangles: 10 square inches x 4 = 40 square inches.

4: Calculate the total surface area of the pyramid.

Add the base area and the total area of the triangular faces: 20 square inches (base) + 40 square inches (triangles) = 60 square inches.

Hence, the gold paper to cover the entire square pyramid is 60 square inches.

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I see that this is a rate of change time of problem

If andy can run 20 miles in 6 hours, than our goal is to find out how much he runs in a hour

So, we just have to divide 20 by 6.

It's sorta hard to explain

Questions?

Anyhow, the answer is around 3.3 miles per hour

Answer:

3.33 miles

Step-by-step explanation:

We Know

Andy can run 20 miles in 6 hours.

How many miles can he run in 1 hour?

We Take

20 / 6 ≈ 3.33 miles

So, Andy can run about 3.33 miles in 1 hour.

Answer: 1  ÷ 2

Step-by-step explanation: I think this is what you mean?

1. The dollar decrease of Jane's investment account is $2,166.

2. The amount in Jane's account at the end was $5,434.

To get the decrease in dollars, we need to calculate 28.5% of $7,600.

The dollar decrease will be:

= 0.285 x $7,600

= $2,166

To find the amount, we must subtract the decrease from the initial amount. So, the end balance will be:

= $7,600 - $2,166

= $5,434

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The Pythagorean Theorem with regards to the relationships between the lengths of the sides of a right triangle indicates that we get;

2. x = 51

3. x = 50

4. x = 82

8. x = 2·√(77)

9. x = √(39)

10. x = 2·√(19)

11. x = 2·√(154)

12. x = 3·√3

13. x = 6·√(13)

16. A right triangle

17. A right triangle

18. The triangle is not a right triangle

19. An obtuse triangle

20. An obtuse triangle

The Pythagorean Theorem states that the square of the length of the hypotenuse side of a right triangle is equivalent to the sum of the squares of the lengths of the other two sides.  

2. x² = 45² + 24² = 2601

x = √(2601) = 51

3. x² = 30² + 40² = 2500

x = √(2500) = 50

x = 50

4. x² = 80² + 18² = 6724

x = √(6724) = 82

x = 82

8. According to the Pythagorean Theorem, in the right triangle we get;

x² = 18² - 4² = 308

x = 2·√(77)

9. x² = 8² - 5² = 39

x = √(39)

10. x² = 20² - 18²

x² = 76

x = √(76) = 2·√(19)

x = 2·√(19)

11. x² = 25² - 3² = 616

x = √(616) = 2·√(154)

x = 2·√(154)

12. x² = 6² - 3² = 27

x = √(27)

x = 3·√3

13. x² = 22² - 4² = 468

x = √(468) = 6·√(13)

x = 6·√(13)

16. A triangle is a right triangle if the square of the side that is the longest is equivalent to the square of the other two sides, therefore;

17² = 289

15² + 8² = 289

Therefore, the triangle is a right triangle

17. 45² = 2025

27² + 36² = 2025

Therefore, the triangle is a right triangle

18. 11² = 121

9² + 4² = 97

Therefore, the triangle is not a right triangle

19. 6² = 36

4² + 3² = 25

The square of the side that is longest is larger than the sum of the squares of the other two sides, which indicates that the angle facing the longest side is lar1ger than 90°, and the triangle is an obtuse triangle.

20. 16² = 256

9² + 11² = 202

16² > 9² + 11²; Therefore, the triangle is an obtuse triangle

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Jonana cut 24 pieces of 1/4 foot length from the 6-foot board

Let "x" be the number of pieces that Jonana cut.

Each piece is 1/4 foot long.

So, the total length of all the pieces is x * 1/4 = x/4 feet.

But the total length is also 6 feet.

So we can set up the equation:

x/4 = 6

Solving for x:

x = 24

Therefore, Jonana cut 24 pieces of 1/4 foot length from the 6-foot board.

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The required height for which the base is 6 inches and the area of 42 square inches is 7 inches.

Each piece will be in a shape of a parallelogram so we know that the area of the parallelogram is given as

area= height * base

Now we are provided with the base of the parallelogram that is 6 inches. The area of the piece is also given as 42 sq inches. So, we can solve and get the height from the above equation.

Height (h) = area/ base

Height (h)= 42/6

Height (h)= 7 inches.

Therefore, Maya should use a height of 7 inches for each piece in order to achieve a base of 6 inches and an area of 42 sq inches.

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The volume of the cone in cubic feet is approximately 0.0 cubic feet

We need to convert the given dimensions from inches to feet before calculating the volume in cubic feet.

The height of the cone is 6 inches, which is equivalent to 6/12 = 0.5 feet (since there are 12 inches in 1 foot).

The radius of the cone is 4.5 inches, which is equivalent to 4.5/12 = 0.375 feet.

Using the formula for the volume of a cone, which is:

V = (1/3) * π * r^2 * h

Substituting the given values, we get:

V = (1/3) * 3.14 * (0.375 feet)^2 * 0.5 feet

V ≈ 0.0221 cubic feet

Rounding this to the nearest tenth gives:

V ≈ 0.0 cubic feet

Therefore, the volume of the cone in cubic feet is approximately 0.0 cubic feet. None of the given options match this result.

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The values of the variables are x = 4 and y = 1

We have the equations as;

3(x-2) + y = 7

4x - 3(y-1) = 16

Using the substitution method

Make 'y' the subject of formula from equation (1), we have;

y = 7 - 3(x-2)

Now, substitute the expression as y in equation (2), we get;

4x - 3(7 -  3(x-2) - 1) = 16

expand the bracket, we have;

4x - 3(7 - 3x + 6 - 1) = 16

collect the like terms

4x - 3(12 - 3x) = 16

4x - 36 + 9x = 16

collect the like terms

13x = 52

x = 4

Substitute the value

y = 7 - 3(4 -2 )

y = 7 -3(2)

y = 1

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Answer:

Step-by-step explanation:

The expression +3(5-3) can be simplified using the order of operations (PEMDAS) as follows: first, we need to perform the exponentiation operation, which gives us 125.

Then, we need to perform the operation inside the parentheses, which gives us 6. Finally, we multiply 3 by 6, giving us 18. Therefore, the simplified expression is 125 + 18 = 143.

To further explain this solution, we use the order of operations, which is a set of rules that dictate the order in which operations must be performed when evaluating an expression. The acronym PEMDAS stands for Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction, which represents the order of operations from left to right.

In this expression, we first need to evaluate the exponentiation operation, which is 5 to the third power. This gives us 125. Next, we need to perform the operation inside the parentheses, which is 5-3. This gives us 2. We then multiply 3 by 2, which gives us 6. Finally, we add 125 and 6, giving us 131.

It is important to follow the order of operations when simplifying an expression to ensure that we obtain the correct result. By using PEMDAS, we can systematically simplify an expression step-by-step, avoiding any potential errors and obtaining a clear and concise solution.

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For the given function y = 126 \sqrt(x), dy is 3.57 if x = 9 and Δx = dx = 0.17.

To find the change in y (or dy), we need to use the formula:

dy = f'(x) * dx

where f'(x) is the derivative of y with respect to x.

The given function is y = 126 \sqrt(x).

To find the derivative, we can use the power rule and chain rule of differentiation.

y = 126x^{1/2}

Taking the derivative of y with respect to x:

dy/dx = 1/2 * 126x^(-1/2)

Simplifying, we get:

dy/dx = 63/(\sqrt(x))

Now, we can substitute x = 9 into this expression to get the value of the derivative at that point:

dy/dx = 63/(\sqrt(9)) = 63/3 = 21

Next, we can use the given value of dx, which is 0.17, to find the change in y or dy.

dy = f'(x) * dx ≈ 21 * 0.17 ≈ 3.57

Therefore, the change in y or dy is approximately 3.57.

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The correct answer is: c. null: mu1 - mu2 = 0; alternative: mu1 - mu2 is not equal to 0

The null hypothesis states that there is no significant difference in the mean lifespan of people in the two towns, while the alternative hypothesis states that there is a significant difference in the mean lifespan of people in the two towns.

Since we are comparing the means of two populations, we use the difference between the means as the test statistic. Therefore, the null hypothesis is mu1 - mu2 = 0 (there is no difference between the means) and the alternative hypothesis is mu1 - mu2 is not equal to 0 (there is a difference between the means).

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The range of the function for this situation is {17, 24.5, 32, 39.5, 47}, The correct option is C.

To find the range of the function for this situation, we need to evaluate the function for x = 2, 3, 4, 5, and 6, since these are the only valid inputs based on the problem statement.

w(2) = 7.5(2) + 2 = 17

w(3) = 7.5(3) + 2 = 24.5

w(4) = 7.5(4) + 2 = 32

w(5) = 7.5(5) + 2 = 39.5

w(6) = 7.5(6) + 2 = 47

Therefore, the range of the function for this situation is {17, 24.5, 32, 39.5, 47}, which is option C.

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