Posted by **Jackie** on Friday, January 25, 2013 at 11:23am.

assume the substance has a half-life of 11 years and the initial amount is 126 grams.

How much remains at the end of 8 years?

- Math -
**Steve**, Friday, January 25, 2013 at 11:33am
126*(1/2)^(8/11) = 76.1g

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