Posted by Myk on Monday, February 14, 2011 at 11:33am.
(0.008)^x = 1/25.
Take log of both sides:
X*log(0.008) = log(0.04),
-2.0969*X = -1.3979,
X = -1.3979 / -2.0969 = 0.6667.
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