document.write( "Question 711137: How long will it take for 100 grams of a substance with a half-life of 2 years to decay to a mass of 50 grams?
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Algebra.Com's Answer #437296 by Alan3354(69443)\"\" \"About 
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How long will it take for 100 grams of a substance with a half-life of 2 years to decay to a mass of 50 grams?
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\n" ); document.write( "It's half as much, so it'll take 2 years.
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