Posted by Rachel on .
In order to have money for their daughter's college education, a young couple started a savings plan into which they made intermittent deposits. They started the account with a deposit of 128.44 dollars (in year zero) and then added 421.97 dollars in year 3, and 723.46 dollars in years 8 and 9. What is the amount they have in the account in year 16 if they earned interest at 4.59% per year and never made any withdrawals? (Accuracy is set at the first decimal.)