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3 years ago

Need help! Can someone help, thanks

Mathematics

2 answers:

ki77a [65]3 years ago

6 0

I believe the length is 18 and the width is 3.

Shalnov [3]3 years ago

5 0

The length is 18ft and the width is 3ft.

How to get this answer?

The length = 6*W
Perimeter = 42 ft

Formulas:
Perimeter = 2Length + 2Width

42ft = 2L + 2W
We know the length is 6W so replace that with L.

42ft = 2(6W) + 2W
42ft = 12W + 2W
42ft = 14W
W = 3ft
L= W*6 = 3*6 = 18ft

Check it with formula:

P = 2L + 2W
2(18) + 2(6) = 42ft, so it is correct.

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Step-by-step explanation:

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This means that $\mu = 5$

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$P(X \geq 1) = 1 - P(X = 0)$

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c) What is the probability that seven people make a purchase in the next four minutes?

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$\mu = 4*5 = 20$

We have to find P(X = 7).

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

$P(X = 0) = \frac{e^{-20}*(20)^{7}}{(7)!} = 0.0005$

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