asked 146k views
0 votes
Petra invests $10 800. After 4 years she has earned $3240 in interest.

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

asked
User Dilenia
by
8.6k points

1 Answer

3 votes
The answer is 72 because 10*8 is 109. Hope that helped
answered
User Stefanos Chrs
by
7.6k points
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