SOLUTION: Find the rate at which 280 dollars will earn 21.00 dollars simple interest for two and a half years?

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Question 674279: Find the rate at which 280 dollars will earn 21.00 dollars simple interest for two and a half years?

Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
I=Prt
21=280r2.5
21/700=r
0.03=r
3%