7. (Basic interest rate) What annual interest rate does it 16. take to make $45,000 grow to be $60,000 in: a. 3 years? b. 5 years? (Basic interest rate) What annual interest rate, earned over 8 years, will make an initial $17,500 grow to be a. $20,000? b. $25,000? c. 10 years? d. 20 years? 8. c. $35,000? d. $50,000? 9. (Present value of uneven cash flows) Find the pres- ent value (as of today) of the following cash flow 18 streams at an interest rate of 8%; Year Stream A Stream B Stream C 19. 1 $1,000 $4,000 $5,000