document.write( "Question 134076: If 100 grams of a radioactive material diminish to 80 grams in 2 years, find the half life of the substance \n" ); document.write( "
Algebra.Com's Answer #98045 by Nate(3500)\"\" \"About 
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100 - 80 = 20 grams lost
\n" ); document.write( "20 / 2 = 50 / x
\n" ); document.write( "10 = 50 / x
\n" ); document.write( "x = 5 years
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