document.write( "Question 452384: a radioactive substance has a half life of 120 days.if an original sample of the substance has a mass of 10 grams, about how much of the substance will remain after 180 days of the original substance
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Algebra.Com's Answer #310985 by ankor@dixie-net.com(22740)\"\" \"About 
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a radioactive substance has a half life of 120 days.
\n" ); document.write( "if an original sample of the substance has a mass of 10 grams, about how much
\n" ); document.write( " of the substance will remain after 180 days of the original substance
\n" ); document.write( ":
\n" ); document.write( "The radioactive decay formula
\n" ); document.write( "A = Ao*2^(-t/h)
\n" ); document.write( "where
\n" ); document.write( "A = resulting amt after t time
\n" ); document.write( "Ao = initial amt
\n" ); document.write( "t = time
\n" ); document.write( "h = half-life of substance
\n" ); document.write( ":
\n" ); document.write( "A = 10*2^(-180/120)
\n" ); document.write( "A = 10*2^(-3/2)
\n" ); document.write( ":
\n" ); document.write( "Find 2^-1.5 on calc
\n" ); document.write( "A = 10 * .35355
\n" ); document.write( "A = 3.5355 grams after 180 days \n" ); document.write( "
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