$($The first example has an extra $-1$ at the end of the formula when we first plug in the numbers. The $-1$ dissappears in the second step, and the answer is correct.$)$

You start with $$350,000$ in a retirement account that earns $4\mathrm{.}8\%$ annual interest. You want the savings to last $20$ years. Howmuch monmey can you withdraw each month? Round you answer to the nearest whole dollar amount.

monthly withdraw amount $$ dollars

Suppose that you instead want to withdraw $$3000$ per month. How long will your savings last? Round you answer up to the next whole number of months.

The savings will last ~~ $$ months

$$