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December 21, 2014

December 21, 2014

Posted by **Mira** on Wednesday, August 1, 2012 at 2:37am.

- physics -
**bobpursley**, Wednesday, August 1, 2012 at 8:39am.1=e^-.693t/6.93

.1=e^-.1

ln.1=.1t

t=-10ln(.1)

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