Derek decides to buy a new car. The dealership offers him a choice of paying $600.00 per month for 5 years (with the first payment due next month) or paying some $28,920.00 today. He can borrow money from his bank to buy the car. What interest rate makes him indifferent between the two options? Submit Answer format: Percentage Round to: 3 decimal places (Example: 9.243%, % sign required. Will accept decimal format rounded to 5 decimal places (ex: 0.09243)