Ms. Sanchez took a trip in May. She paid $2.70 per gallon of gasoline while on the trip. She filled his van four times over the trip. The amounts she bought were: 13.084 gallons, 13.784 gallons, 12.804 gallons, and 13.331 gallons. a. How much gasoline did she buy on the trip? Explain your reasoning.

b. What was her total cost for gasoline on the trip? Explain your reasoning.

c. Her odometer (which measures distance traveled) read 25,421.1 miles when she pulled out of his driveway and 27,809.4 miles when she returned. How many miles did he travel on the trip? Explain.