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Petra invests $10 800. After 4 years she has earned $3240 in interest. At what annual rate of interest did she invest her money?
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Petra invests $10 800. After 4 years she has earned $3240 in interest.

At what annual rate of interest did she invest her money?

User Dilenia
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1 Answer

3 votes
The answer is 72 because 10*8 is 109. Hope that helped
User Stefanos Chrs
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