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2 years ago

9

Andrew walks 3/4 mile in 10 minutes. Jill walked 4/5 mile in 15 minutes. What was the difference in their speeds, in miles per h

our?

1 answer:

andreyandreev [35.5K]2 years ago

3 0

The difference of their speeds is 1.3 mph because Andrew was walking 4.5 mph and Jill was walking 3.2mph.

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3 years ago

Read 2 more answers

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Shalnov [3]

Answer:

The probability that the maximum safe-weight will be exceeded is <u>0.0455 or 4.55%</u>.

Step-by-step explanation:

Given:

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∴ Maximum safe-weight of 1 car (x) = 82 ÷ 37 = 2.22 tons (Unitary method)

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So, standard deviation of 1 car is given as:

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The z-score is given as:

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Now, finding P(x > 2.22) is same as finding P(z > 1.69).

From the z-score table of normal distribution curve, the value of area under the curve for z < 1.69 is 0.9545.

But we need the area under the curve for z > 1.69.

So, we subtract from the total area. Total area is 1 or 100%.

So, $P(z > 1.69) = 1 - P(z < 1.69)$

$P(z>1.69)=1-0.9545=0.0455\ or\ 4.55\%$

Therefore, the probability that the maximum safe-weight will be exceeded is 0.0455 or 4.55%.

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x=33.33333
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Answer:

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Step-by-step explanation:

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