Solve for the unknown interest rate in each of the following (Enter rounded answers as directed, but do not use rounded numbers in intermediate calculations. Enter your answer as a percent rounded to 2 decimal places (e.g., 32.16)):

Present Value Years Interest Rate Future Value

$ 181 4 % $ 297

$ 335 18 % $1,080

$ 48,000 19 % $185,382

$ 40,353 25 % $ 531,618