Surface area of the shape

Based on the tabulated level of significance, the correct answer is:

A two-sample t-test with is used to test whether the difference in means is significant at a 5% level of significance.

The null hypothesis is that there is no difference in the means.

The test statistic for the two-sample t-test is given as:

where;

Substituting the given values:

t = (1245 - 1208) / (√(1346 * (1/12 + 1/11)))

t = 2.29

The calculated t-value (2.29) is greater than the tabulated t-value at a 5% level of significance for 21 degrees of freedom, hence, we reject the null hypothesis and conclude that the means are different.

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Answer:

multiple of 3

Step-by-step explanation:

I think that it will least likely land on a multiple of 3 because none of them are multiples of 3.

Kareem drove the truck for 144 miles.

What is the arithmetic operation?

The four fundamental operations of arithmetic are addition, subtraction, multiplication, and division of two or more quantities. Included in them is the study of numbers, especially the order of operations, which is important for all other areas of mathematics, including algebra, data management, and geometry. The rules of arithmetic operations are required in order to answer the problem.

The additional charge for each mile driven is $0.78, so the total cost of driving "x" miles is:

0.78x

In addition to the cost per mile, Kareem also had to pay a base fee of $15.99. So the total cost of renting the truck for "x" miles is:

0.78x + 15.99

We know that Kareem paid $128.31 in total, so we can set up the equation:

0.78x + 15.99 = 128.31

Solving for "x", we get:

0.78x = 112.32

x = 144

Therefore, Kareem drove the truck for 144 miles.

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The dot in the graph of the inequality, x > 5, will be opened

From the question, we are to determine if the dot in the graph of the given inequality will be opened or closed

The given inequality is x > 5

If the sign of an inequality has the equals sign included, that is greater than or equal to (≥) OR less than or equal to (≤), the dot in the graph will be closed.

But if the inequality is less than or greater than (< or >), the dot in the graph will be opened.

Hence,

The dot in the graph of x > 5 will be opened since the inequality sign is not greater than or equal to (≥) OR less than or equal to (≤).

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The next step to take in copying the angle is:  place the compass at point C and open the compass to the distance between B and C.

The steps that we take in copying an angle are:

1). Draw a working line with the help of a straightedge.

2). Now we put a point A as the vertex of the angle.

3). Construct an arc with a radius 'r' (any length ) from vertex A which intersects the working line say at C.

4). With the same radius we draw an arc from point E which intersects the line ED and EF at G and H respectively.

5). Mark an arc from point G which intersects line EF at I.

6). Measure the distance between points G and I with compass and mark an arc from point C which intersects the previous arc say at U.

7). Now join the points S and U.

Hence we copy any angle.

Thus, looking at the given image, the next step is to place the compass at point C and open the compass to the distance between B and C.

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Answer:

Let's say that the total cost of the classes is C and the number of classes is n. We can assume that each class costs the same amount, which we'll call p.

Then, the total cost of the classes can be expressed as:

C = np

However, Gregory charges a one-time processing fee of $3.00, so the total cost of the classes (including the processing fee) can be expressed as:

C = np + 3

Therefore, the equation that represents the relationship between the total cost of the classes (including the processing fee) and the number of classes is:

C = np + 3

The volume of the model of the Earth is approximately 69.115 cubic centimeters.

Volume is a measure of the amount of space that a three-dimensional object occupies or contains. It is typically measured in cubic units, such as cubic meters, cubic centimeters, or cubic feet.

In the given question,

The volume of a sphere can be found using the formula V = (4/3)πr³, where r is the radius of the sphere. Since the diameter of the Earth model is 4.8 cm, the radius is half of that, or 2.4 cm.

Plugging in this value, we get:

V = (4/3)π(2.4 cm)³

V ≈ 69.115 cm³

Therefore, the volume of the model of the Earth is approximately 69.115 cubic centimeters.

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Answer:

N(0)=10000/(5+1245)

Step-by-step explanation:

substitute zero in for t. Anything to the zero power equals 1.

Answer:

8 people

Step-by-step explanation:

N(0)=10000/(5+1245e^-0.97(0))

N(0) = 10000/(5+1245e^0)

e^0 = 1

= 10000/5+1245(1)

= 10000/5+1245

= 10000/1250

= 8

substitute zero in for t. Anything to the zero power equals 1.

In this case, the given sample mean of 25.3 is only slightly higher than the population mean of 25, and is well within one standard deviation from the population mean. Therefore, the probability of a sample mean being less than 25.3 is 0.9582.

In statistics, the mean is a measure of central tendency that represents the sum of all values in a dataset divided by the total number of values in that dataset. It is also commonly referred to as the average.

Here,

To find the required probability, we need to calculate the z-score first:

z = (x - μ) / (σ / √n)

z = (25.3 - 25) / (1.3 / √68)

z = 1.73

Looking at the standard normal table, the probability of a z-score being less than 1.73 is 0.9582.

To determine whether the given sample mean would be considered unusual, we need to compare it to the population mean and standard deviation. A sample mean is considered unusual if it falls outside the range of values that are expected to occur with a high probability based on the population mean and standard deviation.

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The logarithmic function can be written exponentially as follows.[tex]t = 8^y.[/tex]

Exponents and logarithms are inverse operations of one another. We can rewrite an equation in logarithmic form as log_a(b) = x if it has the form axe = b. A number's logarithm is the exponent that must be raised in order to obtain that number. For instance, since 102 = 100, log_10(100) = 2. Similar to this, we can express an equation in exponential form, such as axe = b, if it is in logarithmic form, such as log_a(b) = x. The inverse function of the logarithmic function is the exponential function. As a result, when we apply a logarithm to an exponential expression, the original exponent is returned, and the opposite is true.

The given logarithmic expression is [tex]log_{8}(t) = y.[/tex]

We know that if we have an equation in the form [tex]a^x = b[/tex], we can rewrite it in logarithmic form as [tex]log_a(b) = x[/tex] and vice versa.

Thus, [tex]log_{8}(t) = y[/tex]

[tex]t = 8^y[/tex]

Hence, the logarithmic function can be written exponentially as follows.[tex]t = 8^y.[/tex]

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Answer:

a. To find the inverse of the function c = w + 3, we can follow the steps below:

Step 1: Replace c with y.

y = w + 3

Step 2: Swap the positions of w and y.

w = y + 3

Step 3: Solve for y.

y = w - 3

Therefore, the inverse function is w = y - 3.

b. To find the inverse of the function y = x - 2, we can follow the steps below:

Step 1: Replace y with f(x).

f(x) = x - 2

Step 2: Swap the positions of x and f(x).

x = f(x) - 2

Step 3: Solve for f(x).

f(x) = x + 2

Therefore, the inverse function is f(x) = x + 2.

c. To find the inverse of the function y = 5x, we can follow the steps below:

Step 1: Replace y with f(x).

f(x) = 5x

Step 2: Swap the positions of x and f(x).

x = 5f(x)

Step 3: Solve for f(x).

f(x) = x/5

Therefore, the inverse function is f(x) = x/5.

d. To find the inverse of the function w = D/7, we can follow the steps below:

Step 1: Replace w with f(D).

f(D) = D/7

Step 2: Swap the positions of D and f(D).

D = f(D)/7

Step 3: Solve for f(D).

f(D) = 7D

Therefore, the inverse function is f(D) = 7D.

On solving the provided question ,we can say that The statement "The number of new clients (x) is 149% of the number of old clients (y)" can be written mathematically as: x = 1.49y

A sequence is a grouping of "terms," or integers. Term examples are 2, 5, and 8. Some sequences can be extended indefinitely by taking advantage of a specific pattern that they exhibit. Use the sequence 2, 5, 8, and then add 3 to make it longer. Formulas exist that show where to seek for words in a sequence. A sequence (or event) in mathematics is a group of things that are arranged in some way. In that it has components (also known as elements or words), it is similar to a set. The length of the sequence is the set of all, possibly infinite, ordered items. the action of arranging two or more things in a sensible sequence.

The statement "The number of new clients (x) is 149% of the number of old clients (y)" can be written mathematically as:

x = 1.49y

-1.49y + x = 0

-149y + 100x = 0

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The linear equation in the required form is: x - 1.49y = 0

What is linear equation?

A linear equation is a mathematical equation that describes a straight line in a two-dimensional plane. It is an equation of the form:

y = mx + b

Let's start by assigning variables to the given information. We are told that "the number of new clients (x) is 149% of the number of old clients (y)."

Using this information, we can write:

x = 1.49y

To write this equation in the form ax + by = c, we need to move all the variables to one side of the equation and simplify.

Subtracting 1.49y from both sides, we get:

x - 1.49y = 0

So the linear equation in the required form is:

x - 1.49y = 0

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Answer:

2.8

Step-by-step explanation:

The formula for calculating simple interest is:

I = Prt

Where I is the interest earned, P is the principal amount, r is the interest rate per year, and t is the time period in years.

In this case, we know that Nick invested $1,000 and earned $112 in interest over a period of 4 years. We can use this information to calculate the interest rate:

112 = 1000 * r * 4

Simplifying the equation, we get:

r = 112 / (1000 * 4)r = 0.028

Multiplying by 100 to convert to a percentage, we get:r = 2.8%

Therefore, Nick's interest rate was 2.8% to the nearest tenth.

Answer:

Step-by-step explanation:

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Answer:

There seems to be a mistake in the provided function for the population size. The function should include the variable t, which represents the number of years from the time the species was added to the lake. Without the variable t, we cannot determine the initial population size or the population size after 7 years.

Assuming that the correct function for the population size is:

P(t) = -2000/(1 + 6e^(-0.42t))

We can find the initial population size by setting t = 0:

P(0) = -2000/(1 + 6e^0) ≈ -480

Rounding to the nearest whole number, the initial population size is -480.

To find the population size after 7 years, we can substitute t = 7 into the function:

P(7) = -2000/(1 + 6e^(-0.42*7)) ≈ 838

Rounding to the nearest whole number, the population size after 7 years is 838.

Morgan's supply of raisins is approximately 4.62 pounds.

What is the equivalent expression?

Equivalent expressions are expressions that perform the same function despite their appearance. If two algebraic expressions are equivalent, they have the same value when we use the same variable value.

Let's start by setting up an equation based on the given information:

14/48 + 38/48 = 5/x

Here, x represents the total supply of raisins in pounds.

To solve for x, we can first combine the fractions on the left-hand side of the equation:

52/48 = 5/x

Next, we can simplify by cross-multiplying:

52x = 48 x 5

52x = 240

Finally, we can solve for x by dividing both sides by 52:

x = 240/52

x ≈ 4.62

Therefore, Morgan's supply of raisins is approximately 4.62 pounds.

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The length of arc AB is 37.71 cm (rounded to the nearest hundredth).

The measure of arc AB is 135°, say Ф = 135°

The radius of the circle is 16 centimeters, say r = 16 cm

The length of an arc can be calculated by the formula as,

Length of Arc = (Ф / 360°)* 2πr            in units

⇒ Length of Arc AB = ( 135° / 360°)* 2π (16)   in cm

Let us consider π = 22/7

⇒ Length of Arc AB  = [tex]\frac{(135) (22/7)(2)(16)}{360}[/tex] in cm

= [tex]\frac{(135)(22)(2)(16)}{(360)(7)}[/tex]  in cm

= [tex]\frac{95040}{2520}[/tex]  in cm

=  37.7142857143 cm

= 37.71 cm (rounded to the nearest hundredth)

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The angle between the two kayakers is given as follows:

83º.

The cosine of the angle between two vectors a and b is obtained according to the equation presented as follows:

[tex]\cos{\theta} = \frac{ab}{|a||b|}[/tex]

In which:

The dot product of the two vectors in this problem is given as follows:

190 x 128 - 160 x 121 = 4960.

The norm of each vector is given as follows:

Hence the angle is obtained as follows:

cos(x) = 4960/(248.4 x 176.1)

cos(x) = 0.1134

x = arccos(0.1134)

x = 83º.

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The minimum amount the student needs to earn per month to save enough money to pay the remaining cost is $500.

The total annual cost to attend community college is $5,000. The college offered a high school senior a scholarship for $1,800 and the student can get a loan for $1,200. To find the minimum amount the student needs to earn per month to save enough money to pay the remaining cost, follow these steps:

1. Subtract the scholarship and loan amounts from the total cost: $5,000 - $1,800 - $1,200 = $2,000.

2. Divide the remaining cost by the number of months (4) until the cost must be paid: $2,000 / 4 = $500.

Therefore, the minimum amount the student needs to earn per month to save enough money to pay the remaining cost is $500.

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Answer: - 7.5

Step-by-step explanation:

Olivia swam farther. This is because 5/8 of a mile is greater than 7/12

Carl swam 7/12 of a mile

Olivia swam 5/8 of a mile

= 7/12

= 0.58

= 5/8

= 0.625

From the calculation above, 5/8 is greater than 7/12

Hence Olivia swam faster than Carl because 5/8 of a mile is greater than 7/12 of a mile

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The value of collinear point mLP = 13x - 34.

Three or more points on the same line are referred to as collinear points. The Latin terms "col" and "linear," which signify together and in the same line, are the source of the English word "collinear."

Since L, M, and P are collinear points, we have:

mLM + mMP = mLP

Substituting the given values, we get:

(8x - 56) + mNP = mLP

(8x - 56) + (5x + 22) = mLP

13x - 34 = mLP

Therefore, mLP = 13x - 34.

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The complete question is:

If mLM = (8x - 56) and mNP = (5x + 22), find mLP.

The length of the segment HI is 32.9

The Circle identities refer to a set of fundamental identities in trigonometry that relate to the some trigonometric functions of an angle in a right-angled triangle.

We know that the equation or formula of secant-tangent;

HI² = KI × JI

Given values:

KI = KJ + JI

KI = 21 + 24 = 45

JI = 24

put the all values in the secant-tangent equation above,

HI² = 45 × 24

HI² = 1080

Take the square root of both sides

HI = 32.9

Hence, the length of the segment HI is 32.9

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Question figure-

The equation of the asymptotes for the given function y = 8/x are x = 0 and y = 0.

What is an asymptote?

an asymptote is a straight line or a curve that a function approaches but never touches as the independent variable (usually denoted by "x") approaches a certain value or becomes very large or small.

In the case of a straight line asymptote, the function approaches the line as x approaches positive or negative infinity. If the line is horizontal, then the function approaches a horizontal asymptote, and if the line is vertical, then the function approaches a vertical asymptote. For example, the function y = 1/x has a vertical asymptote at x = 0, because as x approaches 0, the function approaches infinity (or negative infinity) and never touches the vertical line x = 0.

The given equation y = 8/x represents a hyperbolic function. The graph of this function has two asymptotes, one in the x-axis (y = 0) and the other in the y-axis (x = 0).

To find the equation of the asymptotes, we can use the fact that as x becomes very large or very small, the function approaches the asymptotes. The equation of the vertical asymptote, which is x = 0, can be obtained by taking the limit of the function as x approaches 0 from both the positive and negative sides. We get:

lim x→0+ 8/x = +∞

lim x→0- 8/x = -∞

So the vertical asymptote is x = 0.

The equation of the horizontal asymptote, which is y = 0, can be obtained by taking the limit of the function as x becomes very large. We get:

lim x→±∞ 8/x = 0

So the horizontal asymptote is y = 0.

Therefore, the equation of the asymptotes for the given function y = 8/x are x = 0 and y = 0.

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The test statistic (37.96) is greater than the critical value (11.345), we can reject the null hypothesis and conclude that there is a significant relationship between admission date and birthday.

The test statistic for this test is calculated by summing the squared differences between the observed and expected frequencies in each category, divided by the expected frequency in that category. This formula is:

X² = ∑(observed - expected)² / expected

The degrees of freedom for this test are equal to the number of categories minus one (4-1=3). Using a significance level of 0.01, the critical value for this test is 11.345.

To calculate the test statistic for this sample, we first need to calculate the expected frequencies. Each category should have an expected frequency of 196/4 = 49.

Category 1: expected frequency = 49, observed frequency = 12

Category 2: expected frequency = 49, observed frequency = 22

Category 3: expected frequency = 49, observed frequency = 65

Category 4: expected frequency = 49, observed frequency = 97

Using the formula above, we can calculate the test statistic:

X² = [(12-49)²/49] + [(22-49)²/49] + [(65-49)²/49] + [(97-49)²/49]

X² = 37.96

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Complete Question:

An article focuses on the existence of any relationship between the date of patient admission for treatment of alcoholism and the patient's birthday. Assuming a 365-day year (i.e., excluding leap year), in the absence of any relation, a patient's admission date is equally likely to be any one of the 365 possible days. The investigators established four different admission categories: (1) within 7 days of birthday, (2) between 8 and 30 days, inclusive, from the birthday, (3) between 31 and 90 days, inclusive, from the birthday, and (4) more than 90 days from the birthday. A sample of 196patients gave observed frequencies of 12, 22, 65, and 97 for categories 1, 2, 3, and 4, respectively. State and test the relevant hypotheses using a significance level of 0.01. Calculate the test statistic.

As a result, 68% of the data falls into the range of values between -1 and 1, which is one standard deviation from the mean. The closest estimate of the solution is 68%.

A mathematical equation is a formula that connects two claims and uses the equals symbol (=) to denote equivalence. An equation in algebra is a mathematical statement that establishes the equivalence of two mathematical expressions. For instance, in the equation 3x + 5 = 14, the equal sign places a space between the variables 3x + 5 and 14. The relationship between the two sentences that are written on each side of a letter may be understood using a mathematical formula. The symbol and the single variable are frequently the same. as in, 2x - 4 equals 2, for instance.

For a normally distributed data set with a mean of 0 and a standard deviation of 0.5, the proportion of values between -1 and 1 is most closely related to 68%.

Approximately 68% of the data in a normal distribution lies within one standard deviation of the mean, which explains why. One standard deviation below the mean is -0.5, and one standard deviation above the mean is 0.5 since the mean is 0 and the standard deviation is 0.5. As a result, 68% of the data falls into the range of values between -1 and 1, which is one standard deviation from the mean. The closest estimate of the solution is 68%.

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Answer:

To find the inverse of the function f(x) = (x - 12)^2 on the domain [12, infinity), we can follow the steps below:

Step 1: Replace f(x) with y.

y = (x - 12)^2

Step 2: Swap the positions of x and y.

x = (y - 12)^2

Step 3: Solve for y.

Taking the square root of both sides, we get:

y - 12 = ±√x

Adding 12 to both sides, we get:

y = 12 ± √x

However, we are given that the domain of the inverse function is [12, infinity). Since the expression 12 - √x is negative for x > 144, we must choose the positive square root to satisfy the given domain. Therefore, the inverse function is:

f^-1(x) = 12 + √x, x ≥ 144

Note that we have restricted the domain of the inverse function to [144, infinity) to ensure that the function is one-to-one and has a unique inverse.

Answer: D (t−3)(t−5)(t+4)

Step-by-step explanation:

Hope this helps! :)

Answer:

Step-by-step explanation:

To find the mean/average of each child:  Add all their times and divide by the number of times there are.

Nelson=(108+130+106+121+126+124+110+124+122)/9

   =119

Tyrese=(117,119,118, 120, 136, 118, 118,120, 123)/9

=121

Nelson-Tyrese = 119-121 = -2

For median list numbers in order and pick middle number

Nelson

106, 108, 110, 121, 122, 124, 124, 126, 130

Nelson median=122

Tyrese

117, 118, 118, 118, 119, 120, 120, 123, 136

Tyrese median =119

Based on the data Tyrese is more likely to finish 120 or less.  Most of his times are under that, even though nelson has a better average.

Answer:

Step-by-step explanation

multiply every term by the least common denominator to remove fractions