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3 years ago

8

A rectangle is 80 inches long. The diagonal is 100 inches.

2 answers:

LuckyWell [14K]3 years ago

7 0

The answer is the width is 60 inches long

aev [14]3 years ago

3 0

I assume you are asking for the width of the rectangle
If so, use Pythagorean Theorem, a^2+b^2=c^2
80^22+b^2=100^2
6,400+b^2=10,000
b^2=3600
b=60
so the width equals 60in

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SpyIntel [72]

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OR

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The formula to find the confidence interval $(\mu)$ is given by :-

$\overline{x}\pm z_{\alpha/2, df}\dfrac{s}{\sqrt{n}}$

, where n is the sample size

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Significance level = $\alpha=1-0.95=0.05$

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Two tailed z-value for Significance level of 0.05 :

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$15.3\pm (1.96)\dfrac{1.6}{\sqrt{250}}\\\\ =15.3\pm 0.19833\\\\=\approx15.3\pm0.198\\\\=(15.3-0.198,\ 15.3+0.198)=(15.102,\ 15.498)$

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3 years ago

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Mademuasel [1]

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<A + < B + <C = 180

x + 75+ 50 = 180

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subtract 125 from each side

x = 180-125

x = 55

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3 years ago