business math
posted by sandra .
Manually calculate the compound interest on an investment of $8500 at 6% interest, compounded semiannually, for 18 mo.

business math 
bobpursley
Manually, like with pencil and paper?
Interest= 3*8500*.03 + 8500*.03^2 + 8500(.03^3)=772.88
That is a lot of multiplying manually.
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