9. a) You are saving money for college tuition. When you are born your uncle invests $2000 in a money
market account for you with interest compounded quarterly. What interest rate will he need in order for
you to have $8,000 by the time you are 18?
b) Suppose your uncle finds an account that compounds interest continuously. What does the interest
rate need to be to have the same amount of money by the time you are 18?