Roger has his eye on a new car that will cost $20,000. He has $15,000 in his

Question:

Roger has his eye on a new car that will cost $20,000. He has $15,000 in his savings account, earning interest at a rate of 0.5 percent per month.
a. How long (to the nearest month) will it be before he can buy the car?
b. How long will it be before Roger can buy the car if, in addition to his existing savings, he can save $250 per month?