inheritance as a down payment on your house. a. If you put your inheritance in an account that earns 7 percent interest compounded annually, how many years will it be before your inheritance grows to $31,000 ? b. If you let your money grow for 9.5 years at 7 percent, how much will you have? that pays 13 percent? d. What does all this tell you about the relationship among interest rates, time, and future sums? a. If you put your inheritance in an account that earns 7 percent interest compounded annually, how many years will it be before your inheritance grows to $31,000 ? years (Round to one decimal place.)