document.write( "Question 1044458: If 40 mg of a radioactive substance decays to 5 mg in 12 minutes, find the half life of the substance in minutes. \n" ); document.write( "
Algebra.Com's Answer #659747 by josgarithmetic(39618)\"\" \"About 
You can put this solution on YOUR website!
These all work the same way; see this video example and lesson. \n" ); document.write( "
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