Solve for the unknown number of years in each of the following (Enter rounded answers as directed, but do not use the rounded numbers in intermediate calculations. Round your answers to 2 decimal places (e.g., 32.16)):
Present value years interest rate future value
$1150 ? 12% $2005
2841 ? 10% 4600
34605 ? 15% 396120
34300 ? 22% 225428