You are given two pieces of information: (1) the price of
gasoline in dollars per gallon and (2) the gas mileage of a car in miles per gallon. You are asked to find the cost of driving this car in dollars per mile. You should
a. divide the price of gas by the car's gas mileage.
b. multiply the price of gas by the car's gas mileage.
c. divide the car's gas mileage by the price of gas.