document.write( "Question 1187531: The half-life of a radioactive material is the time in which half of it will disintegrate. If its amount after t years is $\"+%285%29%282%5E%28-t%2F90%29%29+\"$ , what is its half life? \n" ); document.write( "

Algebra.Com's Answer #818522 by ikleyn(52802) $\"\"$ $\"About$

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document.write( "Half-life is when   2^(-t/90) = 2^(-1) = .\r\n" );
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document.write( "It is when\r\n" );
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document.write( "     = -1,   or   t = 90.\r\n" );
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document.write( "ANSWER.  In this problem, the half-life is 90 years.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved, answered and explained.\r
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\n" ); document.write( "\n" ); document.write( "On radioactive decay, see the lesson\r
\n" ); document.write( "\n" ); document.write( "    - Radioactive decay problems \r
\n" ); document.write( "\n" ); document.write( "in this site.\r
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\n" ); document.write( "\n" ); document.write( "You will find many similar (and different) solved problems there.\r
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\n" ); document.write( "\n" ); document.write( "        Use this lesson as your handbook, textbook, guide, tutorials, and (free of charge) home teacher.\r
\n" ); document.write( "\n" ); document.write( "        Learn the subject from there once and for all.\r
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\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-I in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lesson is the part of this online textbook under the topic \"Logarithms\".\r
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\n" ); document.write( "\n" ); document.write( "Save the link to this online textbook together with its description\r
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\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-I
\n" ); document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r
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\n" ); document.write( "\n" ); document.write( "to your archive and use it when it is needed.\r
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