Answer:
$7.32 a person saves on 15.25 gallons of gas by buying regular instead of premium.
Explanation:
We are given rate of regular gasoline = $2.899 per gallon.
Rate of premium gasoline = $3.379 per gallon.
Total cost of 15.25 gallons of gas at the rate $3.379 per gallon = 15.25 ×3.379
= $51.52975
Total cost of 15.25 gallons of gas at the rate $2.899 per gallon = 15.25 ×2.899 =$44.20975.
Difference in cost of 15.25 gallons of gas premium gasoline and 15.25 gallons of gas regular gasoline = $51.52975- $44.20975 = $7.32.
Therefore, $7.32 a person saves on 15.25 gallons of gas by buying regular instead of premium.