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April 18, 2014

April 18, 2014

Posted by **Anonymous** on Wednesday, October 10, 2012 at 8:40pm.

- physics -
**Elena**, Thursday, October 11, 2012 at 7:39pmN=N₀•exp(-ln2•t/T)

N/N₀=1-0.004=0.996

ln0.996= - ln2•t/4.9•10¹º

t= ln0.996•4.9•10¹º/ln2= 2.83•10⁸ years

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