Sally Wilson is planning her retirement. She is presently investing in a 401(k) but needs an additional $500,000 to reach her retirement goal. As luck would have it, Sally just won a brand new car that is worth $36,000 in a raffle. If Sally were to sell the car and invest the $36,000 proceeds at a rate of 6.50%, compounded annually, how long will it be before Sally could retire? (Round off to the nearest 1/10 of a year)