document.write( "Question 324619: A radioactive substance has a half-life of 26 months. If ater 10 months 42 grams remain, aproximate the initial amount to the nearest gram. \n" ); document.write( "

Algebra.Com's Answer #232520 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"N=N0%2Ae%5E%28kt%29\"$
\n" ); document.write( " $\"k%2826%29=ln%281%2F2%29\"$
\n" ); document.write( " $\"k=ln%281%2F2%29%2F26\"$
\n" ); document.write( " $\"k=-0.0267\"$
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( " $\"N0%2Ae%5E%2810k%29=42\"$
\n" ); document.write( " $\"10k=-.267\"$
\n" ); document.write( " $\"N0=42%2Fe%5E%28-.267%29\"$
\n" ); document.write( " $\"N0=54.8=55\"$ grams \n" ); document.write( "

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