You receive a $$9,000$ check from your grandparents for graduation. You decide to save it toward a down payment on a

house. You invest it earning $12\%$ per year and you think you will need to have $$18,000$ saved for the down payment.

How long will it be before the $$9,000$ has grown to $$18,000?$

To double the money you received from your grandparents, it will take

years. $($Round to one decimal place.$)$