Finding the Interest Rate per Period and the Nominal Interest Rate.

5. Present Value = 530, Payment = 80 annually, Term = 8 years and Interest-Compounding Period = 1 year

3. Brenda signed a six-year non-interest bearing note for P52,000. She is allowed to discharge the debt by making six equal annual payments of P7,500 payable at the end of each year. If she can invest her money at 5% compounded annually, should she invest the money instead of paying the debt? Why?