Posted by josh on Wednesday, March 23, 2011 at 6:23pm.
2 = 1(1+i)^20
take 20th root of both sides
1.03526 = 1+i
i = .03526
the rate is 3.526%
continuous growth:
2 = e^(20k)
ln 2 = 20k(lne)
k = ln2/20 = .03466 or 3.466%
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