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December 20, 2014

December 20, 2014

Posted by **Jackie** on Friday, January 25, 2013 at 11:43am.

- math -
**Damon**, Friday, January 25, 2013 at 11:52am1/2 = e^k(11)

ln .5 = 11 k

11 k = -.5978

k = -.05435

so

.15 = e^-.05435 t

-1.897 = - .05435 t

t = 34.9 years

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