From his last trip, Carl knows that his car's mileage is 22 miles per gallon of gas. How many gallons will he use if he is planning a 668-mile roundtrip? Use the formula d= rg. Where d is the distance, r is the rate in miles per gallon, and g is the number of gallons of gas
He would need 31 gallons
also I rounded it
answer: plz give a pic and answer choices so i can answer!