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3 years ago

Which function defines the sequence -8,-6,-4... ?

Mathematics

1 answer:

pentagon [3]3 years ago

6 0

The answer is -2 each time witch means it's B or D

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Find the distance between each point (3,-5),(-3,0)

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(-6,5)

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2 years ago

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12 + 4x > 24 or 10 - 12x > 22

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2 years ago

18 is 0.4 of what because i dont know

Tamiku [17]

'is' means equals
'of' means mutily so
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18 =0.4 times what
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3 years ago

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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.

$\lambda=\dfrac{1}{2}\times 5=2.5$

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.

$P(X=0)=\dfrac{e^{-2.5}(2.5)^0}{0!}=0.0820$

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

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3 years ago