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3 years ago

Toni drives her car 99 mi on the highway on 3 gal of gas. At this rate how many miles can she drive on 11 gal of gas?

Mathematics

1 answer:

Helen [10]3 years ago

4 0

Answer:

333.67 miles

Step-by-step explanation:

She drives her car 91 mi on 3 gal of gas

That’s 91 mi = 3 gal

How many miles can she drive on 11 gal of gas .

Let the mile she can drive by 11 gal of gas be A

At the same rate ,

91 mi = 3 gall

A mi = 11 gal

Cross multiply

A x 3 = 91 x 11

A x 3 = 1001

Divide both sides by 3

A x 3/3 = 1001/3

A = 333.67 miles

At the same rate she’ll drive 333.67 miles on 11 gal of gas

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Answer:

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b2) P(X>2) = 0.152

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Step-by-step explanation:

b1) P(X = 2) = (5C2 * 7C2)/(12C4) = (10 * 21)/(495) = 210/495

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P(X>2) = 0.152

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n = number of selected cameras = 4

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C2) Standard Deviation of X

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Standard Deviation of X = 0.65

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$A=P(1+ \frac{r}{n})^{nt}$

A=future amount
P=present amount
r=rate in decimal
t=time in years
n=how many tmes per year it is compounded

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