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3 years ago

What is the simplified form of 162

Mathematics

1 answer:

SashulF [63]3 years ago

5 0

Answer:

9 √ 2

Step-by-step explanation:

1. Rewrite 162 as $9^{2}$ ⋅2

2. factor 81 out of 162

$\sqrt{81 (2)}$

3. Rewrite 81 as $9^{2}$

$\sqrt{9^{2}.2 }$

4. Pull the terms from under the radical

$\sqrt[9]{2}$

I hope this helps :)

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3 years ago

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kenny6666 [7]

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2 years ago

A researcher records the repair cost for 8 randomly selected washers. A sample mean of $60.46 and standard deviation of $18.36 a

Anuta_ua [19.1K]

Answer:

The critical value is T = 1.895.

The 90% confidence interval for the mean repair cost for the washers is between $48.159 and $72.761

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 8 - 1 = 6

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 6 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.9}{2} = 0.95$ . So we have T = 1.895, which is the critical value.

The margin of error is:

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In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 60.46 - 12.301 = $48.159

The upper end of the interval is the sample mean added to M. So it is 60.46 + 12.301 = $72.761

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3 years ago

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3 years ago

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Answer:

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