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3 years ago

Erica babysits for 4.5 hours and is paid $27. If the people she babysits for have $34 to pay her, how long can they stay out?

Mathematics

1 answer:

Zigmanuir [339]3 years ago

3 0

Answer:

5 2/3 hours

Step-by-step explanation:

We can use a ratio to solve this problem

hours over money

4.5 hours x hours

------------- = ------------

27 dollars 34 dollars

Using cross products

4.5 * 34 = 27 * x

153 =27x

Divide each side by 27

153/27 = 27x/27

5.666666 hours

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4 years ago

A manager records the repair cost for 4 randomly selected stereos. A sample mean of $82.64 and standard deviation of $14.32 are

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Answer:

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Step-by-step explanation:

In order to determine the 90% confidence interval you use the following formula (for a population approximately normal):

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3 years ago

Explain why the measure was selected to report on the data set. The mean price of homes sold in the area is $197,000. Home Price

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Answer:

Only one says the mean s higher than the median, so choose that one.

Step-by-step explanation:

Putting them in order gets yout he following list

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$106,000

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$124,000

$130,000

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3 years ago

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Answer:

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