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September 23, 2014

September 23, 2014

Posted by **lady** on Saturday, October 22, 2011 at 7:14pm.

- math -
**Damon**, Saturday, October 22, 2011 at 8:04pm2.52*10^5 = 252 thousand

do it all in thousands of years

.5 = e^-k(252)

ln .5 = -252 k

solve for k

then

.974 = e^-kt

ln .974 = - k t solve for t

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