1. Koji invested $3,300 at 7.75% interest. After a period of time he withdrew $9,383.31. How long did Koji have his money invested? 2. Mayflower, Inc. has some 7% semi-annual coupon bonds on the market selling at $1,012. The bonds have 9 years left to maturity. What is the effective annual yield on these bonds?

3. What would be the principal balloon payment (that is excluding the fixed monthly payment) at the end of 5 years on a $150,000 loan with monthly payments based on a 30-year term at 12% compounded monthly?