3. Compute the present value of an $850 payment made in 10 years when the discount rate is 12%. 12 13 4. What annual rate of return is earned on a $5,000 investment when it grows to $9,500 in five years? 14 15 5. What is the rate of interest if your money doubles every 6 years? This is also known as Rule of 72. 16 [Answer here] [Answer here]