When Mr. Howe retires at age 65 he expects to have a retirement account worth about $400,000. One month after he retires, and every month thereafter, he intends to withdraw $4000 from the account. The balance will be invested at 9% annual interest compounded monthly.
a) Let An represent the ammount in the account and n months after Mr. Howe's retirement. Give a recursive definition for An
b.) When will there be no money left in the bank account?
I know that the recursive formula is something like tn-1 but that's all I got =/...