document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=140089>Question 140089</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me with this. Thanks! \r<BR>\n" );
document.write( "\n" );
document.write( "Assume that the number of viruses present in a sample is modeled by the exponential function f(t) = 10^t Where t is the elapsed time in minutes. How would you apply logarithms to determine when the sample will grow to 5 billion viruses? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #102092 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=102092\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 5000000000=10^t __ taking log __ log(5000000000)=tlog(10)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "dividing by log(10) __ log(5000000000)/log(10)=t\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "FYI __ this is the American billion, not the British </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );