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sertanlavr [38]
3 years ago
10

if gabby wants to make a regular octagon with a side length of 20 inches of water , how much wire does she need?

Mathematics
1 answer:
EleoNora [17]3 years ago
4 0

Answer:

160 inches

Step-by-step explanation:

An octagon has 8 sides;

20*8=160

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What expression can be used to convert 80 US dollars to australian dollars
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1 US dollar =1.31 Australian dollar
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According to the world atlas (2010) the population of New York City was 19,750,000, the population of Los Angeles was 15,250,000
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A weightlifter holds a 1,700 N barbell 1 meter above the ground. One end of a 2-meter-long chain hangs from the center of the ba
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5 0
3 years ago
The National Cancer Institute estimates that 3.65% of women in their 60s get breast cancer. A mammogram can typically identify c
masha68 [24]

Answer:

39.17% probability that a woman in her 60s who has a positive test actually has breast cancer

Step-by-step explanation:

Bayes Theorem:

Two events, A and B.

P(B|A) = \frac{P(B)*P(A|B)}{P(A)}

In which P(B|A) is the probability of B happening when A has happened and P(A|B) is the probability of A happening when B has happened.

In this question:

Event A: Positive test.

Event B: Having breast cancer.

3.65% of women in their 60s get breast cancer

This means that P(B) = 0.0365

A mammogram can typically identify correctly 85% of cancer cases

This means that P(A|B) = 0.85

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85% of 3.65% and 100-95 = 5% of 100-3.65 = 96.35%. So

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P(B|A) = \frac{0.0365*0.85}{0.0792} = 0.3917

39.17% probability that a woman in her 60s who has a positive test actually has breast cancer

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