What is the present value of a $1,200 payment made every year forever when interest rates are4.5 percent?

A loan is offered with monthly payments and a 15.5 percent APR. What is the loan's effective annual rate (EAR)?

Assume that you contribute $300 per month to a retirement plan for 25 years. Then you are able to increase the contribution to $500 per month for 20 years. Given a 9 percent interest rate, what is the value of your retirement plan after 45 years?

What is the interest rate of a 6-year, annual $10,000 annuity with a present value of $45,000?