The answer is 36,000 because 1 km=1,000 m. Since 1 liter is used every 12 km and you are finding out how many m you will go, you change the km to m and you will multiply it by 3.
12,000x3=36,000 m
Christy will have to work 50 hours to pay off her debt.
500 divided by 10 = 50.
Hope this helped!
