question: Andy's car fuel efficiency is 10 MPG (miles per gallon). If the current price for regular gas is $3/gallon, how much money is Andy's car consuming per week if he only uses his car to go to work from Monday to Friday and the one-way distance between his home and office is 5 miles?
answer: Between Monday to Friday there are 5 days
  If the one-way distance between his home and office is 5 miles the total round trip distance Andy drives daily is 5*2 = <<5*2=10>>10 miles
  That means he drives a total of 10 miles * 5 days = <<10*5=50>>50 miles per week
  If his car's fuel efficiency is 10 MPG, then his car is consuming a total of 50 miles / 10 MPG = <<50/10=5>>5 gallons of gas each week
  Given that each gallon of gas costs $3, then his car is consuming 5 * $3 = $<<5*3=15>>15 worth of gas each week
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