You receive a $$11,000$ check from your grandparents for graduation. You decide to save it toward a down payment on a house. You invest it earning $9\%$ per year and you think you will need to have $$22,000$ saved for the down payment. How long will it be before the $$11,000$ has grown to $$22,000?$

To double the money you received from your grandparents, it will take years. $($Round to one decimal place.$)$