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earnstyle [38]
3 years ago
8

PLEASE HELP ME!!

Mathematics
1 answer:
Dmitry_Shevchenko [17]3 years ago
8 0
It’s 18. 1/2 b*h b=4 h=9
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2 and 1/3 (which is also written as 2 1/3)
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Theres only one way, but if you're putting it as a decimal then you just divide 7 from 3 to get your answer
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•So, 7 ÷ 3 = 2.3
•And 2(3) + 1 = 7 / 3 (if that makes sense)
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4 0
3 years ago
Emergency 911 calls to a small municipality in Idaho come in at the rate of one every two minutes. Assume that the number of 911
nordsb [41]

Answer: a) 30, b) 0.2138, c) 0.0820

Step-by-step explanation:

Since we have given that

X be the number of calls in 1 hour = 60 minutes

Rate of one call every two minutes.

\lambda=\dfrac{1}{2}

(a) What is the expected number of 911 calls in one hour?

\lambda=\dfrac{1}{2}\times 60=30

(b) What is the probability of three 911 calls in five minutes? If required, round your answer to four decimal places.

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Number of calls = 3

So, P(X=3) is given by

P(X=3)=\dfrac{e^{-\lambda}\lambda^x}{x!}\\\\P(X=3)=\dfrac{e^{-2.5}\times (2.5)^3}{3!}\\\\P(X=3)=0.2138

(c) What is the probability of no 911 calls during a five-minute period? If required, round your answer to four decimal places.

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Hence, a) 30, b) 0.2138, c) 0.0820

4 0
3 years ago
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