3 years ago

Deandre knit a scarf for each of his 8 friends. Each scarf was 57.6in

Mathematics

1 answer:

madreJ [45]3 years ago

7 0

Multiply 57.6 x 8 = 460. 8 and since you have to convert it to feet you divide by 12 which gets you 38.4 feet

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A certain virus infects one in every 200 people. a test used to detect the virus in a person is positive 70% of the time when t

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We're told that

$P(A)=\dfrac1{200}=0.005\implies P(A^C)=0.995$

$P(B\mid A)=0.7$

$P(B\mid A^C)=0.05$

a. We want to find $P(A\mid B)$ . By definition of conditional probability,

$P(A\mid B)=\dfrac{P(A\cap B)}{P(B)}$

By the law of total probability,

$P(B)=P(B\cap A)+P(B\cap A^C)=P(B\mid A)P(A)+P(B\mid A^C)P(A^C)$

Then

$P(A\mid B)=\dfrac{P(B\mid A)P(A)}{P(B\mid A)P(A)+P(B\mid A^C)P(A^C)}\approx0.0657$

(the first equality is Bayes' theorem)

b. We want to find $P(A^C\mid B^C)$ .

$P(A^C\mid B^C)=\dfrac{P(A^C\cap B^C)}{P(B^C)}=\dfrac{P(B^C\mid A^C)P(A^C)}{1-P(B)}\approx0.9984$

since $P(B^C\mid A^C)=1-P(B\mid A^C)$ .

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3 years ago

Willa and Jack are playing a game. Willa's score is 1 point. Jack's score is -3 points. Which

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Answer:

Willa's score is 4 points greater than Jack's.

Step-by-step explanation:

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This? .......................................................

adelina 88 [10]

Answer:

109.6

Step-by-step explanation:

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In a science experiment a plant grew 3/4 inch one week and 1/2 inch next week use a common denominator to write an equivalent fr

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First you would multiply 3/4 by 2 then multiply 1/2 by 4 and get 6/8 and 4/8.

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3 years ago

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Help pls !! how would I write this equation

aev [14]

2x = Twice your age

200 = Two hundred less

> -1 = more than negative

With the information given, your equation would be:

200-2x>-1

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3 years ago