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## Homework Statement

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 A

_{n}represent the amount in the account and n months after Mr. Howe's retirement. Give a recursive definition for A

_{n}

b.) When will there be no money left in the bank account?

I know that the recursive formula is something like t

_{n-1}but that's all I got =/...