8,750 30 483,500 5. Calculating the Number of Periods Solve for the unknown number of years in each of the following: Present Value 625 8.400 Years Interest Rate Future Value 1,284 4,34 402,662 173.439 5% 810 13 32 16 21,500 6. Calculating the Number of Periods At 9 percent interest, how long does it take to double your money? To quadruple it? 7. Calculating Present Values Imprudential, Inc., has an unfunded pension liability of 8750 million that must be paid in 20 years. To assess the value of the firm's stock, financial analysts want to discount this liability back to the present. If the relevant discount rate is 8.2 percent, what is the present value of this liability