A. you deposit $25,000 into a bank account earning 8%. you can't withdraw the money until the balance has tripled. how long will you have to leave the money in the account?

B. You recently obtained a 30 year 360 months $200,000 mortgage with a 12% annual interest rate. they are going to pay it and equal monthly installments with the payments at the end of each month. what is the amount of each monthly installment?

C. Forty years ago, your father invested $3,500. today that investment is worth $107,921. What is the average annual rate of return your father earned on his investment?