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Thepotemich [5.8K]
2 years ago
13

on the grid, which point is located in the quadrant where the x-coordinate is a negative number and the y- coordinate is a posit

ive number¿​

Mathematics
1 answer:
lina2011 [118]2 years ago
8 0

Answer:

b

Step-by-step explanation:

because if you look at it the x-coordinate is -6 and the y-coordinate is positive 4

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A statistics student would like to estimate the average age of students at her college. she would like to be 85% confident that
Anna11 [10]

A statistics student would like to estimate the average age of students at her college. she would like to be 85% confident that her estimate includes the actual college population mean

It means confidence level is 0.85.

After taking survey the estimate of population standard deviation is found as 4.5 years. The given margin of error is 0.5 years

The sample size is obtained using formula

n= (\frac{z_{\alpha/2} std}{ME} )^{2}

Where std = standard deviation

alpha = 1 -c = 1-0.85 = 0.15

z(α/2) = z(0.15/2) = z(0.075)

It is the critical value of z such that area above z and below -z is 0.075

Use z score table to find the probability exactly or very close to 0.075 and note the corresponding z score value.

In z score table there is no accurate 0.075 probability value. The close value is 0.0749 which corresponds to z score -1.44

For calculation we take positive z score value.

So we get z(α/2) =1.44

Using all the given values into formula

n = [(1.44 * 4.5) / 0.5]^2

n = 167.96

Rounding it to nearest integer we get n=168

The number of people need to surveyed is n=168

7 0
2 years ago
(1.598 × 10¹7) - (4.58 × 10¹5) simplify
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7 0
2 years ago
Please help quickly, Thanks!
Luda [366]

Answer:

A - 5/6

Step-by-step explanation:

-5/7 ÷ 6/7

Copy dot flip

-5/7 * 7/6

Rearrange to make the math easier

-5/6 * 7/7

-5/6

3 0
3 years ago
Jackson’s backpack weighs 7 3/4 pounds. After he adds food and water to his backpack, it weighs 11 3/4 pounds. If the water weig
rodikova [14]

Answer:

2.25 or 2 1/4 pounds

Step-by-step explanation:

We need to find the weight of the food and water. To do this, find the difference between his backpack before the food and water and after. His backpack without the food is 7 3/4 pounds, and his backpack after is 11 3/4 pounds.

11 3/4 - 7 3/4

4

The food and water together weigh 4 pounds. We know the water weighs 1 3/4 pounds, so we can subtract it from the total to find what the food weighs.

4- 1 3/4

2 1/4

As a decimal: 2.25

The food weighs 2 1/4 or 2.25 pounds

3 0
3 years ago
Stained glass slope graphing linear equation Description: Identify the slope and y-intercept of the linear equation. Then, graph
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u can you download the gauthmath app i promise it's very helpful :)

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2 years ago
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