i will give u brianliest!

Answer:

yo I need this to

Step-by-step explanation:

please let me know when you get the answer thank you

The minimum sample size that should be surveyed to estimate the average entrance exam score within a 50-point margin of error at a 98% confidence level is approximately 3417.

When conducting research, it is important to determine the appropriate sample size in order to obtain accurate and reliable results. In this case, we want to calculate the minimum sample size needed to estimate the average entrance exam score within a certain margin of error. We are given the population standard deviation, the desired confidence level, and the desired margin of error.

To calculate the minimum sample size, we can use the formula for sample size estimation in confidence interval calculations:

n = (z² * σ²) / E²

where:

n = sample size

z = z-value corresponding to the desired confidence level

σ = population standard deviation

E = margin of error

In our case, we want to estimate the average entrance exam score within a margin of 50 points at a 98% confidence level. The given z-value for a 98% confidence level is z0.01 = 2.326. The population standard deviation is σ = 194, and the desired margin of error is E = 50.

Plugging these values into the formula, we have:

n = (2.326² * 194²) / 50²²

Calculating this expression, we get:

n ≈ (2.326² * 194²) / 50² ≈ 3416.18

Since the sample size must be a whole number, we round up to the nearest integer:

n = ceil(3416.18) = 3417

Therefore, the minimum sample size that should be surveyed to estimate the average entrance exam score within a 50-point margin of error at a 98% confidence level is approximately 3417.

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Complete Question

You are researching the average entrance exam score, and you want to know how many people you should survey if you want to know, at a 98% confidence level, that the sample mean score is within 50 points. From above, we know that the population standard deviation is 194, and z0.01=2.326. What is the minimum sample size that should be surveyed?

Answer:

First graph (see below)

Step-by-step explanation:

The graph of the arctan(x) is the first graph attached, see below. This is because if you were to plug in the equation in any TI calculator, you would get this graph.

Answer:

X=137

Step-by-step explanation:

(8-2)180=1080

use 1080-the angle and you get the answer

The variable assigned to strgrade when intscore equals 90 would likely be 'A'.

When the variable intscore equals 90, the corresponding value assigned to the variable strgrade would typically be 'A'. This suggests that a score of 90 is associated with the highest grade achievable in the given context. The specific mapping between integer scores and letter grades may vary depending on the grading system or criteria in place. It is important to note that without further information about the grading scale or specific rules defined within the system, it is difficult to determine the exact value of strgrade assigned to intscore of 90.

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Answer:

it's D.

Step-by-step explanation:

the x intercept is the line that goes straight across the screen, so since the blue crosses the x line at (2,0) that would make it the x intercept.

Its D Have a nice day!!!!!!!!!!!!!

Answer:

Answer 1 : 25/4

Answer 2 : 1/19

Step-by-step explanation:

Question 1:

x + 3x = 25

4x = 25

x = 25/4

Question 2:

2x+36x=2

38x = 2

x = 2/38

x = 1/19

Answer:

5 Marigolds and 9 Zinnias

Step-by-step explanation:

5x12=60

9×10=90

90+60=150

So that is your answer

Hailey can buy at least 5 trays of marigolds and 9 trays of zinnias with a budget of $150.00.

Let's solve the problem step by step. Let the number of trays of zinnias that Hailey buys be represented by the variable 'Z', and the number of trays of marigolds be represented by the variable 'M'.

Each tray of marigolds costs $12.00, so the total cost of the marigolds would be 12M. Hailey wants more than 3 trays of marigolds, so M > 3.

Similarly, each tray of zinnias costs $10.00, so the total cost of the zinnias would be 10Z. Hailey wants at least 5 trays of zinnias, so Z ≥ 5.

Hailey has a budget of $150.00, so the total cost of the flowers cannot exceed $150.00. Therefore, we can write the following inequality:

12M + 10Z ≤ 150

To find the possible values of M and Z that satisfy the given conditions, we can use trial and error or a systematic approach. Let's check a few values that satisfy the given conditions:

For M = 4 and Z = 5:

12(4) + 10(5) = 48 + 50 = 98, which is less than $150.00, so this is a valid solution.

For M = 5 and Z = 9:

12(5) + 10(9) = 60 + 90 = 150, which is equal to $150.00, so this is also a valid solution.

Other possible combinations could be M = 6 and Z = 5, M = 6 and Z = 6, and so on.

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Gas station A sells gasoline at a lower rate. Its price is $3.05 per gallon

In order to determine which gas station sells gasoline at a lower rate, we need to calculate the price of one gallon at each gas station using the given information.

Given that:

For Gas station A, the price of 3 gallons is 9.15, so we can calculate the price  of 1 gallon as:

price  of 1 gallon = 9.15/3 = $3.05

For Gas station B, the equation that represents the price, p, for gallons, g, of gasoline as p = $3.08g. To calculate the price of 1 gallon, substitute g = 1 into the equation:

p =  $3.08g

price of 1 gallon = $3.08 × 1 = $3.08

The price of  1 gallon in Gas station A ($3.05) is less than the price of  1 gallon Gas station B ($3.08).

Therefore, Gas station A sells gasoline at a lower rate. Its price is $3.05 per gallon. Option C is the answer

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Answer:

13

Step-by-step explanation:

if you take the ideal number and multiply it with 12 the subtract 13 and add 1 and subtract seven the divide that by 11 and then Divid that answer by 17 and then you have your answer which is 13

Answer:

\(V = 245\frac{1}{3} in^{2}\)

Step-by-step explanation:

The volume of a pyramid is equal to the area of the base times height divded by three so

\(V = \frac{A_{base} h }{3} \\V = \frac{(8^{2})(11.5) }{3} \\V = \frac{736}{3} \\V = 245\frac{1}{3} in^{2}\)

Answer:

245 1/3

Step-by-step explanation:

Answer:

\(b. \:distributive \: property \: of \: equality \\ c. \: collect \: like \: terms\\ d. \: addition \: property \: of \: equality \\ e. \: division \: property \: of \: equality \)

Answer:

18. Its 2 meters.

19. Its 0.2 grams

20. Its 1,920

Step-by-step explanation:

When you convert 200 centimeters to meters its 2.

When you convert 2,000 milligrams in grams its 0.2

15% of 12, 800 is 1,920

Hope this helps:)

I may be completely wrong j a heads up.

but I think the answer is

10 quarters and 25 dimes

explanation:

35-25=10

35-10=25

10•25=250

25•10=250

250+250=500

An individual's BMR decreases approximately 3 to 5 percent per decade on an average after the age of option C. 30.

Therefore, on an average individuals BMR is approximately decreases by round about 3 to 5 percent per decade after the age of option c. 30.

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Answer:

The current population of Charleston, South Carolina is 141,931 based on our projections of the latest US Census estimates. The US Census estimates the 2018

Step-by-step explanation:

Shape A was reflected over the y axis and translated 1 unit down to get shape B.

Transformation is the movement of a point from its initial location to a new location. Types of transformation are reflection, translation, rotation and dilation.

Translation is the movement of a point either up, down, left or right on the coordinate plane.

Shape A was reflected over the y axis and translated 1 unit down to get shape B.

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Answer:

7.59 lateral area of the pyrimad

Step-by-step explanation:

Answer:

Interest rate = 2.41%

Step-by-step explanation:

The total value of an investment was $305.33 after $240 was invested for 10 years compounded monthly. Find the interest rate.

The formula to calculate the Interest rate for a Compound Interest is given as:

Solving for rate r as a decimal

r = n[(A/P)^1/nt - 1]

r = 12 × [(305.33/240.00)^1/(12)(10) - 1]

r = 0.0240996

Then convert r to R as a percentage

R = r * 100

R = 0.0240996 * 100

R = 2.41%/year

Therefore, the Interest rate = 2.41%

Answer:

The variable should be m=minutes

The equation should be 25m=175

Thus the answer being 7 minutes.

Assuming that the order of the cities matters, the number of possible routes is 11! (11 factorial), which is 39916800.

The number of possible routes for an overnight express company that includes eleven cities on its route is 39916800. This is because when the order of the cities matters, the number of possible routes can be calculated by finding 11 factorial, which is:

This calculation results in 39916800, which means that there are 39916800 potential routes for an overnight express company with eleven cities on its route.

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The coefficients for the Newton interpolation polynomial are b₀ = -3.0, b₁ = 2.3, b₂ = -1.1, and b₃ = -1.3.

To interpolate the given data set using Newton interpolation, we need to find the coefficients b₀, b₁, b₂, and b₃.

To find b₀, we use the formula:

b₀ = y₀

where y₀ is the first y-value in the data set. In this case, y₀ = -3.0.

So, b₀ = -3.0.

To find b₁, we use the divided differences. The divided difference between two points (xᵢ, yᵢ) and (xⱼ, yⱼ) is defined as:

f[xᵢ, xⱼ] = (yᵢ - yⱼ) / (xᵢ - xⱼ)

Using the given data, we have:

f[x₀, x₁] = (-3.0 - (-5.3)) / (1.0 - 2.0) = 2.3

f[x₁, x₂] = (-5.3 - (-9.8)) / (2.0 - 3.0) = 4.5

f[x₂, x₃] = (-9.8 - (-6.3)) / (3.0 - 4.0) = -3.5

Next, we calculate the second-order divided differences:

f[x₀, x₁, x₂] = (f[x₁, x₂] - f[x₀, x₁]) / (x₀ - x₂) = (4.5 - 2.3) / (1.0 - 3.0) = -1.1

f[x₁, x₂, x₃] = (f[x₂, x₃] - f[x₁, x₂]) / (x₁ - x₃) = (-3.5 - 4.5) / (2.0 - 4.0) = 4.0

Finally, we calculate the third-order divided difference:

f[x₀, x₁, x₂, x₃] = (f[x₁, x₂, x₃] - f[x₀, x₁, x₂]) / (x₀ - x₃) = (4.0 - (-1.1)) / (1.0 - 4.0) = -1.3

The coefficients b₁, b₂, and b₃ correspond to the first, second, and third-order divided differences, respectively. Therefore:

b₁ = f[x₀, x₁] = 2.3

b₂ = f[x₀, x₁, x₂] = -1.1

b₃ = f[x₀, x₁, x₂, x₃] = -1.3

So, the coefficients for the Newton interpolation polynomial are:

b₀ = -3.0

b₁ = 2.3

b₂ = -1.1

b₃ = -1.3

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Answer:

\(7\sqrt{2} \ cm\)

Step-by-step explanation:

Formula ………………………………………………

The length of a diagonal of a square with side of length “a” is :

\(a\sqrt{2}\)

======================================================

Since a = 7 (in our case) then

\(\text{the length of the diagonal} =7\sqrt{2}\)

Note : you can also use the Pythagorean theorem.

the answer is: f · dr = -30

To find f · dr for the line c from (3, 2, -2) to (6, 1, 7), we first need to parametrize the line in terms of a vector function r(t). We can do this as follows:

r(t) = <3, 2, -2> + t<3, -1, 9>

This gives us a vector function that describes all the points on the line c as t varies.

Next, we need to calculate f · dr for this line. We can use the formula:

f · dr = ∫c f · dr

where the integral is taken over the line c. We can evaluate this integral by substituting r(t) for dr and evaluating the dot product:

f · dr = ∫c f · dr = ∫[3,6] f(r(t)) · r'(t) dt

where [3,6] is the interval of values for t that correspond to the endpoints of the line c. We can evaluate the dot product f(r(t)) · r'(t) as follows:

f(r(t)) · r'(t) = <5y, 2, -1> · <3, -1, 9>

= 15y - 2 - 9

= 15y - 11

where we used the given expression for f and the derivative of r(t), which is r'(t) = <3, -1, 9>.

Plugging this dot product back into the integral, we get:

f · dr = ∫[3,6] f(r(t)) · r'(t) dt

= ∫[3,6] (15y - 11) dt

To evaluate this integral, we need to express y in terms of t. We can do this by using the equation for the y-component of r(t):

y = 2 - t/3

Substituting this into the integral, we get:

f · dr = ∫[3,6] (15(2 - t/3) - 11) dt

= ∫[3,6] (19 - 5t) dt

= [(19t - 5t^2/2)]|[3,6]

= (57/2 - 117/2)

= -30

Therefore, the answer is:

f · dr = -30

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According to the information, it can be inferred that there is a correlation between the data because they vary, however the variation is not constant.

Based on the information in the table, we can see the average minutes spent by different people (of different ages) watching television and reading. In the case of reading, there is evidence of a constant increase in the time spent reading as age increases. In the case of television, the variable tends to rise, however it is not a constant increase.

Due to the above, we can establish that the relationship of the data is a correlation because in a certain way age can influence the number of minutes that a person spends reading or watching television. However, it is not the only factor that influences. Other factors that could influence are free time, time at work, time at school or university, time in other hobbies, among others.

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Answer:

15 of $3 books and 4 of the $8 books

Step-by-step explanation:

15×3= 45

8 × 4= 34

45+32= 77

The function h(x) = (f.g)(x) would be x² + 10x + 24.

What are composite functions?

A composite function is generally a function that is written inside another function. The composition of a function is done by substituting one function into another function. For example, f [g (x)] is the composite function of f (x) and g (x). The composite function f [g (x)] is read as “f of g of x”.

To find h(x) = (f.g)(x), we need to find the composition of the functions f(x) and g(x).

The composition of two functions f(x) and g(x) is denoted by (f.g)(x) and is defined as (f.g)(x) = f(g(x)).

In this case, we have:

h(x) = (f.g)(x) = f(g(x)) = f(x + 5)

Substituting x + 5 for g(x) in the equation for f(x), we get:

h(x) = (f.g)(x) = f(x + 5) = (x + 5)² - 1

Simplifying this expression, we get:

h(x) = (f.g)(x) = x² + 10x + 24

Hence, the function h(x) = (f.g)(x) would be x² + 10x + 24.

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