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Kitty [74]
3 years ago
5

If stratified random sampling with proportional allocation is used to select a sample of 25 high​ schools, how many would be sel

ected from the stratum with a​ percent-free-lunch value of 40 less than or equals x​?
Mathematics
1 answer:
gregori [183]3 years ago
7 0

Answer:

02 High Schools would be selected from the stratum with a​ percent-free-lunch value of 40 less than or equals x​.

Step-by-step explanation:

As the sample size needed is 25 and total schools are 100 so this indicate 1 school in each 4 schools is to be selected. This is given as

n=\frac{n_{total}}{n_{sample}}\\n=\frac{100}{25}\\n=4

Now as the schools with percent free lunch are 8 so now

n=\frac{n_{total}}{n_{sample}}\\n=\frac{8}{2}\\n=2

So only 2 schools will be selected in this regard.

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At the grocery store, 3 apples cost $0.65. What is the cost of 8 apples?
Mars2501 [29]

Answer:

$1.76

Step-by-step explanation:

First we need to figure out the cost of one apple.

To do this, divide the cost by the amount.

That's .65/3, which equals .216666, but we should round that number to .22

So if one apple is 22 cents, and we need to know how much money 8 apples is, we times .22 by 8, which gives us 1.76

Hope this helps :))

7 0
3 years ago
Read 2 more answers
How do you factor x^4-(4x-5)^2
koban [17]
The answer would be (x-1)(x+5)(x^2-4x+5)
7 0
3 years ago
Connor gathered dry ingredients to make a large pan of brownies. He mixed1 1/4 cups of sugar, 2 2/3 cups of flour and 1 1/6 cups
sveta [45]

Answer:

5\frac{1}{2}

Explanation:

1. Find a common denominator for the three fractions. A common denominator is a number all three numbers divide into evenly. The lowest common denominator for 4, 3, and 6 is 12.

2. Find the numerators. This can be done by multiplying the current numerators by however many times the old denominator goes into the new denominator.

4 goes into 12 3 times

3 goes into 12 4 times

6 goes into 12 2 times

1 x 3 = 3

2 x 4 = 8

1 x 6 = 6

So, the fractions become:

1\frac{3}{12} + 2\frac{8}{12} + 1\frac{2}{12}

3. Add the numerators of the new fractions and keep the denominator the same.

4 \frac{13}{12}

4. Convert the improper fraction to a mixed number.

1 \frac{1}{12}

5. Finally, add the whole numbers.

1 + 4 = 5

3 0
3 years ago
Find the value of x to the nearest tenth.
rosijanka [135]
Check the picture below

the angle is in degrees, thus, make sure your calculator is in Degree mode

3 0
3 years ago
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Clara's goal is to practice the piano 6 hours this week. If she already practiced 3 1/6 hours. How much more hours does she need
Serggg [28]
6 = 36/6
3 1/6 = 19/6
36/6 - 19/6 = 17/6
17/6 hours is your answer which is 2 5/6 hours
8 0
3 years ago
Read 2 more answers
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