You are given the distance you can drive each week. Your car capacity can only get 25 miles and you ran out of gas. For every 25 miles you need 1 gallon of gas. Each station, the gas prices at 3 dollars per gallon. You are required to find how much money you will spend each week. So you divide 150 miles by 25 miles and you get 6 because your car can only drive every 25 miles. You multiply 6 by 3 dollars and you will get 18 dollars. You will spend 18 dollars per week.