Darlene's Caillou's 8 gallons of gasoline to travel 340 miles at mechanic work on the car and use 7 gallons of gasoline to travel 350 miles if the price of gasoline was approximately $4 per gallon how much less to the nearest cent per get a smile that it cost to run after the mechanic work on it

Before mechanic:

340 miles with 8 gallons.

A gallon costs $4, so 8 gallons cost 8 * $4 = $32.

$32 per 340 miles = $32/340 = $0.0941/mile = 9.4 cents/mile

After mechanic:

350 miles with 7 gallons.

7 gallons cost 7 * $4 = $28.

$28 per 350 miles = $28/350 = $0.08/mile = 8 cents/mile

The difference is 9.4 - 8 = 1.4.

To the nearest cent, round 1.4 to 1.

Answer: After the mechanic, it cost 1 cent per mile less to run the car.