Posted by Anonymous on Friday, March 30, 2012 at 11:01am.
An account invested in a money market fund grew from $67,081.2 to $67,359.39 in a month. What was the annual interest rate?

math  Steve, Friday, March 30, 2012 at 12:14pm
67359.39/67081.20 = 1.004147
so, that's .4147%/month = 4.9%/yr
assuming simple interest, or compound interest, compounded monthly
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