5. A friend asks you if I invest today and can earn 15% per year, how long will it take me to make 16 times my money?

6. What is the future value of $1,600 deposited per year, for 12 years, at an interest rate of 5.5%?

7. What is the future value of $1,600 deposited per year, for 12 years, if the deposits start today, at an interest rate of 5.5%?

8. What is the future value of $15,000 deposited today, and $900 deposited per year, for 8 years, if the account can earn an annual interest rate of 7%?