Dale's car uses one quart of oil for every four tanks of gas. The car averages 28 miles per gallon and has a fuel capacity of 17 gallons. At this rate, how many gallons of oil will Dale use in the next 100,000 miles?

Answer:13.125 gallons of oil

Step-by-step explanation:

Dale's car uses one quart of oil for every four tanks of gas.

1 quart of oil = 1/4 gallons of oil

Dale's car uses one quart of oil for every four tanks of gas. This means that he uses 1/4 gallons of oil for every 4 tanks of gas

Mileage of the car is the number of miles travelled by the car with 1 gallon of gas. The car averages 28 miles per gallon. That means its mileage is 28 miles per gallon

Capacity of the tank of the car is 17 gallons of gas

Distance traveled by the car = mileage * the number of gallons of gas

100,000 miles will require 28 * x gallons.

x = 100000/28 = 3571.43 gallons

Number of tanks will be total number of gallons used / number of gallons in one tank. It becomes

3571.43 / 17 = 210.1 tanks

1/4 gallons of oil is used for 4 tanks

y gallons of oil will be used for 210 tanks

y = (1/4 * 210) / 4 = 13.125 gallons of oil