Question

Darnell’s car used 8 gallons of gasoline to travel 340 miles. After a mechanic worked on the car, it used 7 gallons of gasoline to travel 350 miles. If the price of gasoline was approximately $4.00 per gallon, how much less, to the nearest cent per mile, did it cost to run the car after the mechanic worked on it?

Answer 1

Answer:

$0.014

Step-by-step explanation:

Before the mechanic worked on the car:

Gas used = 8 gallons

Distance traveled = 340 miles

Cost per gallon = $4.00

8 · 4 = $32

So, the cost of gas before the mechanic is $32.

After the mechanic worked on the car:

Gas used = 7 gallons

Distance traveled = 350 miles

Cost per gallon = $4.00

7 · 4 = $28

So, the cost of gas after the mechanic is $28.

Difference in cost per mile = Cost per mile before - Cost per mile after

(32.00 ÷ 340 miles) - (28.00 ÷ 350 miles) ≈ $0.014

So, it cost approximately $0.0141 less per mile to run the car after the mechanic worked on it.