1. You must pay off a loan in 15 months with a nominal semiannual interest rate of 12%. The payoff amount is $1500. How much did you borrow?

2. . You deposit $400 into an account with a 12% nominal monthly discount rate. How much is in the account after 6 months?

3. For a monthly nominal interest rate of 15%, what is the equivalent interest rate compounded semiannually?

4. For a quarterly nominal discount rate of 12%, what is the equivalent weekly nominal discount rate?