Posted by Amy on Wednesday, January 12, 2011 at 7:36pm.
What annual rate of interest is required to double an investment in 3 years?

Precalc  Amy, Wednesday, January 12, 2011 at 8:08pm
i tried solving this but got .23 instead of 26%

Precalc  helper, Wednesday, January 12, 2011 at 8:21pm
I know at 7% interest an investment will double in 10 years, but this doesn't help you.
let me see what I can find
is your problem simple interest?

Precalc  Amy, Wednesday, January 12, 2011 at 8:25pm
I think so, yes A = Pe^(r)(t)

Precalc  This question is still open please help, Wednesday, January 12, 2011 at 9:23pm
please help
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