document.write( "Question 1160661: the half-life of Radium-226 is 1590 years. If a sample contains 400mg, how many mg will remain after 3000 \"highlight%28years%29\" ?
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Algebra.Com's Answer #784026 by ikleyn(52797)\"\" \"About 
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document.write( "The remaining mass of Radium-226 after 3000 years will be\r\n" );
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document.write( "    M = \"400%2A%281%2F2%29%5E%283000%2F1590%29\" grams = 108.163 grams.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Notice that the ratio   \"3000%2F1590\" = 1.886792   is the number of half-life periods in  3000  years.\r
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\n" ); document.write( "\n" ); document.write( "On radioactive decay, see the lessons\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
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\n" ); document.write( "\n" ); document.write( "The referred lessons are 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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