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3 years ago

12

LOTS OF POINTS!! A cyclist rides a 25 mile stretch of road at a constant speed. It takes her 90 minutes to ride the 25 miles . A

t what speed is she riding? Please tell me the correct answer and how you got the answer step by step!!! Whoever does this will get the brainliest!!!

1 answer:

sattari [20]3 years ago

7 0

25m/90minutes = .278 mile/minute

Divide 25/90 to get .278

Hope that helps

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y=√(4+x)(4−x)

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The students should request an examination with 5 examiners.

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$=0.715$

The probability that the students passes if request an examination with 3 examiners is 0.715.

Compute the probability that the students passes if request an examination with 5 examiners as follows:

$P(Y)=P(Y|X)P(X)+P(Y|X^{c})P(X^{c})$

$=[\sum\limits^{5}_{x=3}{{5\choose x}(0.80)^{x}(1-0.80)^{5-x}}]\times\frac{2}{3}+[\sum\limits^{5}_{x=3}{{5\choose x}(0.40)^{x}(1-0.40)^{5-x}}]\times\frac{1}{3}$

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