Posted by Jackie on Friday, January 25, 2013 at 11:23am.
assume the substance has a halflife 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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