Amy invests 1000 at an effective annual rate of 14% for 10 years. Interest is payable annually and is reinvested at an annual effective rate of i. At the end of 10 years, the accumulated interest is 2,341.08. Bob invests 150 at the end of each year for 20 years at an annual effective rate of 15%. Interest is payable annually and is reinvested at an annual effective rate of i. Find Bobs accumulated interest at the end of 20 years.

The answer is 9041.5, but I'm not sure how to get there.