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svp [43]
2 years ago
14

The area of a rectangular wall of a barn is 33 square feet. Its length is 8 feet longer than the width. Find the length and widt

h of the wall of the barn.
Mathematics
1 answer:
Rama09 [41]2 years ago
4 0

Answer:

Width=3ft

Length=11ft

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What is the perimeter of the smaller triangle?
Luden [163]

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14 mm

Step-by-step explanation:

Just as the little side is 1/4 of the larger side , so is the perimeter

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A survey of 80 randomly selected companies asked them to report the annual income of their presidents. Assuming that incomes are
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Answer:

The 90% confidence interval estimate of the mean annual income of all company presidents is ($579,545, $590,580).

Step-by-step explanation:

The information provided is:

n=80\\\sigma=30,000\\\bar x=585062.50\\\text{Confidence level} = 90\%

The critical value of <em>z</em> for 90% confidence level is, 1.645.

Compute the 90% confidence interval estimate of the mean annual income of all company presidents as follows:

CI=\bar x\pm z_{\alpha/2}\cdot\frac{\sigma}{\sqrt{n}}\\\\=585062.50\pm 1.645\times\frac{30000}{\sqrt{80}}\\\\=585062.50\pm5517.50\\\\=(579545, 590580)

Thus, the 90% confidence interval estimate of the mean annual income of all company presidents is ($579,545, $590,580).

This interval implies that there is 90% probability that the true mean annual income of all company presidents is within this interval.

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