Question

Rosa filled her car's tank with 9.8 gallons of gas. Each gallon cost $3.85. How much did rosa spend on gas?

Answer 1

All you got to do it multiply.
multiply the number of gallons she put in her car with the cost of each gallon.
9.8*3.85 = 37.73

Answer 2

37.73 because it is 9.8 gallons times 3.85