document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=456220>Question 456220</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The half-life of silicon-32 is 710 years. If 30 grams is present now, how much will be present in 100 years? (Round your answer to three decimal places.)  <BR>\n" );
document.write( " A. 11.302  <BR>\n" );
document.write( "B. 0.021  <BR>\n" );
document.write( "C. 27.21  <BR>\n" );
document.write( "D. 29.709  <BR>\n" );
document.write( " <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #313212 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=313212\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The half-life of silicon-32 is 710 years.<BR>\n" );
document.write( " If 30 grams is present now, how much will be present in 100 years?<BR>\n" );
document.write( ":<BR>\n" );
document.write( "The radioactive decay formula: A = Ao*2^(-t/h); where<BR>\n" );
document.write( "A = resulting amt after t time<BR>\n" );
document.write( "Ao = initial amt (t=0)<BR>\n" );
document.write( "t = time of decay<BR>\n" );
document.write( "h = half-life of the substance<BR>\n" );
document.write( ":<BR>\n" );
document.write( "A = 30*2^(-100/710)<BR>\n" );
document.write( "Find 2^(-10/71) on a calc<BR>\n" );
document.write( "A = 30*.906988<BR>\n" );
document.write( "A = 27.210 grams left after 100 yrs  </SPAN>\n" );
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