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3 years ago

jenny peddled her bike for 11 miles in 45 minutes if she traveled the same speed how far would she reach in 2 hours?

2 answers:

8 0

60 * 2 = 120
120 / 45 = 2.6...7
2.6 * 45 = 29.3... (3 repeating) mi.

Messed that up!

11 / 45 = .24...
.24 * 120 = 28.8

zzz [600]3 years ago

8 0

11(miles)/45(minutes)=.24 miles per minute

.24(miles per minute)*120(2hours=120minutes)=28.8 miles she biked in 2 hours

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Answer:

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Step-by-step explanation:

add 5 for the first one because 5 + 5 = 10

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For the 2nd one: 25k means 25 thousand or the Product of 25 and k.

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2 years ago

Erin buys a bag of peanuts away is 3/4 of a pound later that week the bag is 2/3 full how much does the bag of peanuts weigh now

vladimir2022 [97]

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3 years ago

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gogolik [260]

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Step-by-step explanation:

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3 years ago

businessText message users receive or send an average of 62.7 text messages per day. How many text messages does a text message

KiRa [710]

Answer:

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Step-by-step explanation:

Let X = number of text messages receive or send in an hour.

The random variable X follows a Poisson distribution with parameter λ.

It is provided that users receive or send 62.7 text messages in 24 hours.

Then the average number of text messages received or sent in an hour is: $\lambda=\frac{62.7}{24}= 2.6125$ .

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$P(X=x)=\frac{e^{-\lambda}\lambda^{x}}{x!} ;\ x=0, 1, 2, 3, ...$

(a)

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$P(X=3)=\frac{e^{-2.6125}(2.6125)^{3}}{3!} =0.21798\approx0.2180$

Thus, the probability that a text message user receives or sends three messages per hour is 0.2180.

(b)

Compute the probability that a text message user receives or sends more than three messages per hour as follows:

P (X > 3) = 1 - P (X ≤ 3)

= 1 - P (X = 0) - P (X = 1) - P (X = 2) - P (X = 3)

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Thus, the probability that a text message user receives or sends more than three messages per hour is 0.2667.

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