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salantis [7]
4 years ago
12

Look down below for question

Mathematics
1 answer:
Rainbow [258]4 years ago
3 0
The maximum amount of time the skier is in the air would be the time to "fall" the 50 meters. 

distance = 1/2 a t^2

50 = 1/2 (9.8) t^2

t= 3.2 seconds
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Find the area of the parallelogram.<br> __cm^2
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A factory makes car batteries. The probability that a battery is defective is 1/14. If 400 batteries are tested, about how many
Rufina [12.5K]

Answer:

28.6, that is, about 29 are expected to be defective

Step-by-step explanation:

For each battery, there are only two possible outcomes. Either it is defective, or it is not. The probability of a battery being defective is independent of other betteries. So the binomial probability distribution is used to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The expected value of the binomial distribution is:

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The probability that a battery is defective is 1/14.

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400 batteries.

This means that n = 400

How many are expected to be defective?

E(X) = np = 400*\frac{1}{14} = 28.6

28.6, that is, about 29 are expected to be defective

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4 years ago
The pentagon ABCDE is dilated to the image A'B'C'D'E' with the center of the dilation at the origin.
pshichka [43]

Answer:

it the second one

Step-by-step explanation:

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