2 years ago

Subtract 9 from e. Then, divide by 2.

Mathematics

2 answers:

lilavasa [31]2 years ago

5 0

Answer:

Step-by-step explanation:

saw5 [17]2 years ago

4 0

C. (e-9) / 2

E-9 has to be in parentheses because of Pemdas

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Suppose we want a 90% confidence interval for the average amount spent on entertainment (movies, concerts, dates, etc.) by fresh

katovenus [111]

Answer:

609

Step-by-step explanation:

Standard deviation = $\sigma$ = $30

Margin of error = E = $2

Confidence level = 90%

Since the distribution is said to be normal, we will use z scores to solve this problem.

The z score for 90% confidence level = z = 1.645

Sample size= n = ?

The formula to calculate the margin of error is:

$E=z\frac{\sigma}{\sqrt{n}}\\\\\sqrt{n}=z\frac{\sigma}{E}\\\\n=(\frac{z\sigma}{E} )^{2}$

Using the values in above equation, we get:

$n=(\frac{1.645 \times 30}{2} )^{2}\\\\ n = 608.9$

This means, the minimum number of observations required is 609

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3 years ago

Last year a large trucking company delivered 9.0 × 105 tons of goods with an average value of $17,000 per ton. What was the tota

stealth61 [152]

I don't really understand the question but I'll answer how I'm reading it.

9 x 105 = 945
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3 years ago

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anzhelika [568]

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2 years ago

In the paralleologram above, what is the value of x+y?

Mice21 [21]

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kirill115 [55]

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