Homework Help: Precalc

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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