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DENIUS [597]
3 years ago
10

27

Mathematics
1 answer:
katrin2010 [14]3 years ago
6 0

Answer:

A  ≈ 35.3 units²

Step-by-step explanation:

Calculate the radius CB using Pythagoras' identity in the right triangle.

CB² + AB² = AC²

CB² + 6² = 9²

CB² + 36 = 81 ( subtract 36 from both sides )

CB²  = 45 = r²

Then area of quarter circle is

A = \frac{1}{4} × πr² = \frac{1}{4} × π × 45 ≈ 35.3

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Answers:

a. First because there are only 2 possible outcomes for each birth: male or female. Hence a binomial distribution. <span>
Second, because the probability of giving out a girl is constant: 0.49 for each birth. 
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