Q: If interest paid on an investment is $25.21 for 50 days at an interest rate of 8.25%, what was the original amount invested if the exact interest method is used? (Round to the nearest cent).

A: I = P*r*t solving for P. Principal amount = I/r*t = 25.21/(.0825*50/365) = 25.21/0.011458= $ 2200.21