document.write( "Question 866024: The half life of a radioactive isotope is 394 days. A sample of this isotope is 10 grams.\r
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\n" ); document.write( "b. How long will it take the sample to be 3.5 grams? \n" ); document.write( "

Algebra.Com's Answer #522042 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "The half life of a radioactive isotope is 394 days. k = ln(.5)/-394 = .0018
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document.write( "A sample of this isotope is 10 grams.  A = 10e^(-.0018t)
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document.write( "b.,   t = ln(.35)/(-.0018) \n" );
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