Question

A bank employee notices an abandoned checking account with a balance of $412.if the bank charges a $4 monthly fee for the account, the function b=412-4m. When will the bank account balance be 0?

Answer 1

Here's what I'd do. If the account loses $4 per month, and it currently has $412, then do 412/4, which is 103 months. So in 103 months, or about 8 1/2 years, the bank account will be out of money.