Bob invests $2000 at an effective annual interest rate of 15% for 10 years. interest is payable annually and reinvested at an effective annual rate j. at the end of 10 years, Bob's accumulated interest is W.
Mary invests $500 at the end of each year for 20 years at effective annual rate of 12%. interest is payable annually and reinvested at effective annual rate j. let X be Mary's accumulated interest after 20 years. express j as a function of X and W.