You graduate and receive a

$9,000

cheque from your grandparents. You decide to save it toward a down payment on a house. You invest it earning

5%

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.)