document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=140096>Question 140096</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I don't understand this question. \r<BR>\n" );
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document.write( "A computer is infected with the Sasser viruse. Assume that it infects 20 other computers within 5 minutes; and that these PCs and servers each infect 20 more machines within another 5 minutes, etc. How long until 100 million computers are infected?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #102087 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=102087\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> every 5 minutes, the number of infected computers is MULTIPLIED by 20<BR>\n" );
document.write( "__ 1...20...400...8000...etc __ how long until 100 million?\r<BR>\n" );
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document.write( "let t=\"time in minutes\" __ 100M=1(20)^(t/5)\r<BR>\n" );
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document.write( "taking log __ log(100M)=(t/5)(log(20))\r<BR>\n" );
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document.write( "dividing by log(20) __ log(100M)/log(20)=t/5\r<BR>\n" );
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document.write( "multiplying by 5 __ 5[log(100M)/log(20)]=t </SPAN>\n" );
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