Contemporary Mathematics for Business & Consumers 8th Edition by Robert Brechner,Geroge Bergeman

Exercise 111

Over the past 10 years, you've made the following investments:
1. Deposited $10,000 at 8% compounded semiannually in a 3-year certificate of deposit.
2. After 3 years, you took the maturity value (principal and interest) of that CD and added another $5,000 to buy a 4-year, 6% certificate compounded quarterly.
3. When that certificate matured, you added another $8,000 and bought a 3-year, 7 % certificate compounded annually.
a. What was the total worth of your investment when the last certificate matured
b. What is the total amount of compound interest earned over the 10-year period