Question

Kara's family car holds 20 gallons of gasoline. Each day the car uses 0.7gallons of gasoline. A warning light comes on when the remaining gasoline is 1.8 gallons or less, Starting from a full tank, can Kara's family drive the car for 18 days without the warning light coming on? Explain your reasoning. Yes, they can drive for 18 days because the gas tank has more than 1.8 gallons in the tank. O No, they can not drive for 18 days because the gas tank has less than 1.8 gallons in the tank.​

Answer 1

To figure out if Kara's family can drive the car for 18 days without the warning light coming on, we need to find out how much gasoline is used during those 18 days.

Since the car uses 0.7 gallons of gasoline per day, over 18 days it will use:

0.7 gallons/day x 18 days = 12.6 gallons

If we subtract the amount of gasoline used during the 18 days from the total amount the tank can hold, we can find out how much gasoline will be left in the tank:

20 gallons - 12.6 gallons = 7.4 gallons

Since 7.4 gallons is more than 1.8 gallons, Kara's family can drive the car for 18 days without the warning light coming on. Therefore, the answer is Yes, they can drive for 18 days because the gas tank has more than 1.8 gallons in the tank.