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
	$	650						12	%			$	1,505
		2,341						10					4,100
		33,605						15					391,120
		33,300						22					210,308