Solve for the unknown number of years in each of the following: (Do not round intermediate calculations and round your answers to 2 decimal places, e.g., 32.16.)

Present Value				Years			Interest Rate				Future Value
	$	750						9	%			$	1,605
		2,441						7					4,200
		33,805						12					392,120
		33,500						19					213,332