SOLUTION: lets say if i invest 4200 for three years and earn 630 whats the simplest interest rate

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Question 572908: lets say if i invest 4200 for three years and earn 630 whats the simplest interest rate
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
I=Prt
630=4200*r*3
630=12600r
r=630/12600
r=0.05=5%