Below is a few questions I need explantions for, answers are helpful but not relevant, I know there are formulas for these but I am away from my textbook. Thanks inadvance.

A. Haley wants to retire at the age of 60. If she invests $20,000 at 12% when she is 25, how much money will she have at the age of 60?

B. Paul wants to buy a house 5 years from now. His grandmother gives him $5,000 for a graduation gift. If he invests that money at 10%, how much will he have for a downpayment in 5 years?

C. Thirteen years from now, you will be inheriting $30,000. What is this inheritance worth to you today if you can earn 4 percent interest compounded annually?

D. You want to have $15,000 for a down payment on a house 5 years from now. If you can earn 13 percent, compounded annually, on your savings, how much do you need to deposit today to reach your goal?

E. You need $20,000 in cash to buy a car 5 years from today. You expect to earn 6.5 percent, compounded annually, on your savings. How much do you need to deposit today if this is the only money you save for this purpose?