Pleaseeee help???????

Answer:

Step-by-step explanation:

85°

Answer:

60

Step-by-step explanation:

All the sides are equal

A right circular cylinder is a three dimensional geometric figure with its top and bottom as circle. The exact surface area for the given cylinder is  10π square cm.

A cylinder is a three dimensional geometric figure.

The volume of a cylinder is given as πr²h, where r is the radius and h is the height of the cylinder.

Given that,

The radius of cylinder r = 1 and one fourth cm

                                       = 1 + 1 / 4 cm

                                       = 5 / 4 cm

The height of cylinder h = 2 and three fourth cm

                                        = 2 + 3 / 4 cm

                                       = 11 / 4 cm.

Since the exact surface area of cylinder is given by 2πr(h+ r), the exact surface area for the given cylinder is given as,

= 2π × (5 / 4 ) × ((11 / 4) +  ( 5 / 4))

= 2π × (5 / 4 ) × 4

= 10π

Hence, the exact surface area for the given cylinder is 10π square cm.

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99.96% of area lies between given value range under the curve.

We can use a standard normal distribution table or a calculator with a normal distribution function to determine the area under the curve of the standard normal distribution between z = -3.5 and z = 3.5. The difference between the area to the left of z = 3.5 and the area to the left of z = -3.5 is the area under the curve between these two numbers.

We determine the region to the left of z = 3.5 and z = -3.5 using a typical normal distribution table. Left of z = 3.5 is an area of 0.9998, whereas left of z = -3.5 is an area of 0.0002. Hence, the region between z = -3.5 and z = 3.5 is as follows:

0.9998 - 0.0002 = 0.9996

To turn this to a percentage, we multiply by 100:

0.9996 x 100 = 99.96%

In other words, 99.96% of the area is within 3.5 standard deviations of the mean, or between z = -3.5 and z = 3.5. This shows that most values in a normal distribution fall within a few standard deviations of the mean and accounts for a sizeable portion of the overall area under the curve.

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Answer:

Supplementary angles

Step-by-step explanation:

Supplementary angles are two angles whose sum is 180 degrees while complementary angles are two angles whose sum is 90 degrees.

Answer:

Supplementary angles are angles that add up to 180 degrees.

Step-by-step explanation:

Hope this helps:)

Using the four-step process,  f'(1) = 10, f'(2) = 12, and f'(3) = 14.

To identify f'(x), the derivative of f(x), using the four-step process, we can follow these steps:

1: Identify the function.
The given function is f(x) = x^2 + 8x - 6.

2: Apply the power rule.
Differentiate each term of the function separately.
The derivative of x^2 is 2x.
The derivative of 8x is 8.
The derivative of -6 is 0 (constant term).

3: Simplify.
Combine the derivatives obtained in step 2.
So, f'(x) = 2x + 8.

4: Evaluate f'(1), f'(2), and f'(3).
Substitute x = 1, 2, and 3 into the derived equation to identify the respective values.
f'(1) = 2(1) + 8 = 10.
f'(2) = 2(2) + 8 = 12.
f'(3) = 2(3) + 8 = 14.

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Option d. "Increase the sample size or increase the significance level" is the correct choice.

To increase the power of a test of significance, you should increase the sample size or increase the significance level.

Increasing the sample size allows for a larger amount of data, which can provide more information and improve the precision of the test. With a larger sample size, the test has a better chance of detecting smaller effects or differences, leading to increased power.

Similarly, increasing the significance level (also known as the alpha level) makes the test more liberal by allowing for a higher chance of rejecting the null hypothesis. This means that even smaller differences or effects will be considered statistically significant, resulting in increased power. However, it's important to note that increasing the significance level also increases the probability of making a Type I error (rejecting the null hypothesis when it's actually true), so it should be done cautiously and based on the specific context and requirements of the analysis.

Decreasing the sample size (option a) or decreasing the significance level (option b) would generally reduce the power of the test, making it less likely to detect true effects or differences. Option c, which suggests decreasing either the sample size or the significance level, is not correct because decreasing these factors would not increase the power.

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Using this expression Rn = (4/n) Σi=0n-1 [(1 + Δx)/Δx]^(-2i-2), we can now compute the Riemann sum for different values of n. As n gets larger, the Riemann sum gets closer to the exact value of the integral.

To use the definition of the definite integral to evaluate the given integral ∫31(2x^- 2)dx using a right-endpoint approximation to generate the Riemann sum, we first need to split the interval [3,1] into smaller subintervals. Let's choose n subintervals of equal width, where n is a positive integer. Then, the width of each subinterval will be Δx = (3-1)/n = 2/n.
Next, we need to choose the right endpoint of each subinterval as the sample point to evaluate the function. Therefore, the i-th sample point will be xi = 1 + iΔx, where i = 0, 1, 2, ..., n-1.Using these sample points, the Riemann sum for the given integral is given by:
Rn = Σi=0n-1 f(xi)Δx
where f(x) = 2x^-2 is the integrand.
Substituting the expressions for xi and Δx, we get:
Rn = Σi=0n-1 f(1 + iΔx)Δx
Rn = Σi=0n-1 (2/(1 + iΔx)^2)(2/n)
Now, we can simplify this expression using the formula for the sum of a geometric series:
Σi=0n-1 r^i = (1 - r^n)/(1 - r)
where r is the common ratio.
In our case, the common ratio is (1 + Δx)/Δx, so we have:
Rn = (4/n) Σi=0n-1 [(1 + Δx)/Δx]^(-2i-2)

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It is possible for there to be a real number t such that tan(t) is equal to 5/4.

The tangent function (tan) is a periodic function that repeats its values every π radians or 180 degrees. It has both positive and negative values across its periodicity. Therefore, for any given value of tan(t), there are multiple solutions.

To find a specific angle where tan(t) is equal to 5/4, we can use inverse trigonometric functions. The inverse tangent function (arctan or \(tan^{-1}\)) can be used to find the angle associated with a given tangent value.

In this case, we can find an angle t such that tan(t) = 5/4 by taking the inverse tangent of 5/4. Using a calculator or mathematical software, we find that arctan(5/4) is approximately 51.34 degrees or approximately 0.896 radians.

Therefore, there exists a real number t such that tan(t) is equal to 5/4, specifically at approximately t = 51.34 degrees or t = 0.896 radians.

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Answer:

I believe not statistical.

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

Fot the two random samples of customers from Internet provider, a) The null and alternative hypothesis are \(H_0 : \mu_1 = \mu_2 \\ H_a : \mu_1< \mu_2\).

b) The appropriate test that we will use is Two sample t-test.

We have an independent random sample with sample size from provider A, n₁ = 8

Sample size for provider B, n₂ = 10

Sample mean for sample A, \(\bar X_1\) = 35.2 years

Standard deviations, s₁ = 8.2

Sample mean for sample B, \(\bar X_2 \) = 38.4 years

standard deviations, s₂ = 5.8

Level of significance, a = 10% = 0.10

a) Now, we have check the claim that the average age for customers is less for those using Internet provider A than for Internet provider B, is true or not. Consider the null and alternative hypothesis are defined as \(H_0 : \mu_1 = \mu_2 \\ H_a : \mu_1< \mu_2\).

b) As we have two samples with all details like mean, standard deviations, etc. So, to check the validity of null hypothesis we will use two sample t test. The test statistic value is written as

\(t = \frac{ \bar X_1 - \bar X_2 }{\sqrt{s_p²(\frac{1}{n_1}+\frac{1}{n_2}})}\), where Pooled standard deviations,\(s_p =\frac{( n_1 - 1)s_1² + (n_2 - 1)s_2²}{n_1 + n_2 - 2} \).

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The correct answer is C) 12 - (y • 2) and 12 - (2 • y),  are Equivalent expressions.

The two expressions that are equivalent are:

C) 12 - (y • 2) and 12 - (2 • y)

The equivalence, let's expand both expressions:

Expression C: 12 - (y • 2)

Expanding the expression, we have: 12 - 2y

Expression D: 12 - (2 • y)

Expanding the expression, we have: 12 - 2y

The order of the terms being subtracted (y • 2 or 2 • y) does not affect the result. Therefore, expressions C) 12 - (y • 2) and 12 - (2 • y) are equivalent.

A) 4 + (3 • y) and (4 + 3) • y

Expanding the expressions, we have: 4 + 3y and 7y

These expressions are not equivalent as they have different terms.

B) (18 ÷ y) + 10 and 10 + (y ÷ 18)

Simplifying the expressions, we have: (18/y) + 10 and 10 + (y/18)

These expressions are not equivalent either as the terms are arranged differently.

D) (10 - 6) ÷ y and 10 - (6 ÷ y)

Simplifying the expressions, we have: 4/y and 10 - (6/y)

These expressions are not equivalent as they have different structures and operations.

Therefore, the correct answer is C) 12 - (y • 2) and 12 - (2 • y), which are equivalent expressions.

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By taking a random sample, you can accurately represent the opinions of the entire population of Justice, Illinois.

To obtain a simple random sample of 20 residents from the list of 5,832 residents provided by the mayor of Justice, Illinois, the following steps can be followed:

This procedure ensures that each resident has an equal chance of being selected, making it a simple random sample. By taking a random sample, you can accurately represent the opinions of the entire population of Justice, Illinois. The larger the sample size, the more accurate the representation, but taking a sample of 20 residents should still provide useful insights into the opinions of the residents.

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One of the possible solution is x = 0 and y = 12.

The amount of money earned by washing cars is 7 dollars per hour.

The amount of money earned by landscaping is 10 dollars per hour.

The maximum number of working hours is 12.

The minimum amount of money to be earned is 90 dollars.

The number of hours of washing cars is represented by "x".

The number of hours of landscaping is represented by "y".

The inequalities formed are given below :

x + y ≤ 12

7x + 10y ≥ 90

The solution is the area which is common to both the inequalities and in the first quadrant. The graph is attached below.

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Answer:

225,000 (selling price) 75,000 (profit)

Step-by-step explanation:

x = (150,000 ÷ 2) x 3

x = 75,000 x 3

x = 225,000

225,000 (sell) - 150,000 (cost)

= 75,000 (profit)

Answer:

15

Step-by-step explanation:

3x5=15

15x1=15

xoxo!

a) The present value of $25,000 due 9 periods from now, discounted at 10%, is approximately $10,593.22.

b) The present value of $25,000 to be received at the end of each of 6 periods, discounted at 9%, is approximately $22,935.35.

(a) Present Value of $25,000 due 9 periods from now, discounted at 10%:

To calculate the present value, we need to discount the future cash flow of $25,000 back to its current value using the given discount rate of 10%. The formula to calculate the present value is:

Present Value = Future Value / (1 + Discount Rate)ⁿ

Where:

Future Value is the amount to be received in the future ($25,000).

Discount Rate is the rate at which we discount the future cash flow (10%).

'n' is the number of periods or years until the future cash flow is received (9 periods in this case).

Let's plug in the values into the formula and calculate the present value:

Present Value = $25,000 / (1 + 0.10)⁹

Calculating the denominator:

(1 + 0.10)⁹ = 1.10⁹ ≈ 2.36

Present Value = $25,000 / 2.36 ≈ $10,593.22

(b) Present Value of $25,000 to be received at the end of each of 6 periods, discounted at 9%:

In this case, we have a cash flow of $25,000 to be received at the end of each of 6 periods, discounted at 9%. Let's calculate the present value:

Present Value = $25,000 / (1 + 0.09)¹ + $25,000 / (1 + 0.09)² + ... + $25,000 / (1 + 0.09)^6

Calculating each discount factor:

(1 + 0.09)¹ ≈ 1.09

(1 + 0.09)² ≈ 1.1881

(1 + 0.09)³ ≈ 1.2950

(1 + 0.09)⁴ ≈ 1.4116

(1 + 0.09)⁵ ≈ 1.5386

(1 + 0.09)⁶ ≈ 1.6765

Plugging in the values and summing them up:

Present Value = $25,000 / 1.09 + $25,000 / 1.1881 + $25,000 / 1.2950 + $25,000 / 1.4116 + $25,000 / 1.5386 + $25,000 / 1.6765

Present Value ≈ $22,935.35

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The overall area of the exclamation point at the Little Havana billboard is about 24 square ft while rounded to the nearest square foot.

To discover the total area of the exclamation point, we need to calculate the area of the sector and the area of the circle, after which add them collectively.

First, let's find the area of the sector. The formula for the area of a circle area is:

Area of sector = (angle/360) x π x radius^2

Substituting the given values, we get:

Area of sector = \((24/360) x π x 9^2 = 16.62 ft²\)

Next, let's find the area of the circle. The components for the area of a circle is:

Area of circle = π x radius^2

Substituting the given value, we get:

Area of circle \(= π x 1.5^2 = 7.07 ft²\)

Now, we are able to add the areas of the sector and the circle to get the whole area of the exclamation point:

\(6.62 feet² + 7.07 feet² = 23.69 ft²\)

Therefore, the overall area of the exclamation point at the Little Havana billboard is about 24 square ft while rounded to the nearest square foot.

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The solution for the variable y according to the one-variable equation given in the task content is; y = -7.5.

It follows from the task content that the equation which is given in the task content and from which the variable y is to be determined is;

−140 = 18 + 20y − 8.

Hence, the equation can be solved as follows;

−140=18+20y−8

Evaluate each side of the equation;

-140 = 10 + 20y

Subtract 10 from both sides;

-150 = 20y

Divide through by 20; we have;

-7.5 = y.

Ultimately, the solution for the variable y as required in the task content is; y = -7.5.

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Answer:

e or f

Step-by-step explanation:

Answer:

the area of face of washer is 22cm sq

Step-by-step explanation:

Assuming it is compounded annually:

A = P (1 + r)^t

where A is the final amount

P is the principal,

r is the annual rate,

and t is time in years.

A = 335 (1 + 0.052)^2.5

A = 380.26

Answer: Multiply the centimeters number by 10.

Step-by-step explanation: There are 10 millimeters in every centimeter.

Considering that y is between x and z, we have that:

We consider that y is between x and z, hence the length of the segment is given by:

xz = xy + yz

The separate lengths are given as follows:

Hence:

4k + 38 = 3k - 2 + 7k + 4.

4k + 38 = 10k + 2

6k = 36

k = 6.

Hence the length of yz is given by:

yz = 7k + 4 = 7(6) + 4 = 42 + 4 = 46 units.

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The change in the temperature is 11°.

Temperature is the physical quantity which describes, how much hot is something? Or we can say it is the quantity which measures the hotness and coldness of something. There are two main quantity values to measure the temperature which are Celsius and Fahrenheit.

Mathematically we can write :

1° Celsius = 32 Fahrenheit

Suppose if we have temperature of two difference time space then we can easily find the difference between the two by simply subtracting them.

For the given question,

last year temperature = 82 degree

temperature today = 71 degree

therefore the change in the temperature in one year is :

82 - 71 = 11 degree.

Thus , the change in temperature is 11 degree.

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Answer:

1,500 calories

Step-by-step explanation:

2,400 ÷ 8 = 300

300 × 5 = 1,500

Answer:

A

Step-by-step explanation:

If you simplify 40/100, you should get 4/10, which is still the same amount that Mark has.

You simplify by finding the greatest common factor between 40 and 100. In this case, it is 10. So you divide 40 by 10 and 100 by 10 to simplify.