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Select the letter of the correct answer.
A bus has a 180-gallon gas tank. The bus leaves Gloucester County with a full tank of gas and drives 129 miles to Baltimore. During the trip, the bus uses one gallon of gas every 3.3 miles.
How full is the gas tank when the bus reaches Baltimore? Round to the nearest percent.

A) 78% full

B)51% full

C)54% full

I'm not even sure where to start with this problem.So any help is greatly appreciated.Thank you :).

Respuesta :

Beatrice14
would it be B which is 51%
as you do 129 devided by 3.3 = 39.1
180-39.1= 141
141 is just over half
Vimal1
First we have to find how much gas was used:
We divide 3.3 by 129 to see how many 3.3 is in 129 (if that make sense)
However, we will get 39.09
Since one gallon is 3.3 miles then 39.09 gallons of gas was used.
So how much is now left we minus 180-39.09 = 140.91
We now find what percentage is 140.91 of 180.
n/100 × 180 = 140.91
n/100 = 140.91/180
n/100 =
n = 0.7828*100
n = 78.28

There n is equal to 78 % to the nearest percent

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