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October 2, 2014

October 2, 2014

Posted by **TITA** on Monday, November 23, 2009 at 7:19pm.

How much will be left at the end of the third year of thr original sample?

How much will be left at the end of the fourth year of the original sample?

- Physics -
**drwls**, Monday, November 23, 2009 at 7:45pmFraction left at t = (1/2)^(t/T)

where T is the half life, which is 5 years in this case.

For the first question, solve

(1/2)^(2/5) = 75.8%

Repeat using the same formula for the other times t.

- Physics -
**Anonymous**, Monday, September 15, 2014 at 9:38ambnmm

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