$1$

One of your customers is delinquent on his accounts payable balance. You've mutually agreed to a repayment schedule of $$500$ per month.

$2$ You will charge $1\mathrm{.}8$ percent per month interest on the overdue balance. If the current balance is $$18,000,$ how long will it take for the account to be paid off?

$3$

Input area:

$\backslash$table$[[$Monthly payment,$$500$