A school counselor heard that teenagers sleep an average of 9 hours per night on the weekend. The counselor

Mathematics

1 answer:

Katen [24]2 years ago

7 0

Answer:

H0:μ=9 hours Ha:μ not equal to 9 hours

Step-by-step explanation:

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Julia has 4 gallons 2 quarts of water.Ally needs the same amount of water but only has 12 quarts.How much more water does Ally n

denis-greek [22]

Well there are 4 quarts to a gallon and 4 / 12 = 3 so she has 3 gallons so she needs 1 gallon and 2 quarts
so the answer is 1Gallon and 2Quarts

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3 years ago

Mike is building storage boxes. Each box will have a length of 5 feet, a width of 412 feet, and a height of 312 feet. A pint of

alex41 [277]

The pints of paint that Mike needs to buy in order to paint 4 boxes is 9 pints.

How many pints is needed?

The first step is determine the total surface area of a box.

Total surface area of a cuboid = 2 (lw + wh + lh)

where:
l = length
w = width
h = height

2 x[ (5 x 9/2) + (9/2 x 7/2) + (5 x 7/2) ]
2 x ( 45/2 + 63/4 + 35/2) = 111.5ft

The second step is to determine the total surface area of 4 boxes:

111.5 x 4 = 446

Now, divide 446 by 50

446 / 50 = 9 pints

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1 year ago

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Candy selling at $6.00 per pound will be mixed with candy selling at $9.00 per pound. How many pounds of the more expensive cand

gregori [183]

I think the answer is 10

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2 years ago

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What the answer tonthis question 10x=-4(2x-9)

mylen [45]

10x = 4(2x -9)

10x = 8x - 36

10x - 8x = -36 - 8x

2x = -36

2x ÷ 2 = -36 ÷ 2

x = -18

If you need a better explanation just as in the comments.

Happy to help! Please mark as BRAINLIEST! Thanks

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3 years ago

Answer the question for a normal random variable x with mean μ and standard deviation σ specified below. (Round your answer to o

vladimir2022 [97]

Answer:

x = 63.6

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X and also the area to its left. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X, which is the area to its right.

In this problem, we have that:

$\mu = 38, \sigma = 11$