document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1147675>Question 1147675</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The count in a bacteria culture was 200 after 15 minutes and 2000 after 40 minutes. Assuming the count grows exponentially,\r<BR>\n" );
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document.write( "what is the doubling period?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #769025 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=769025\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+P+=+P%280%29%2A%28+1+%2B+r+%29%5Et+ ALIGN=MIDDLE  ALT=\"+P+=+P%280%29%2A%28+1+%2B+r+%29%5Et+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+200+=+P%280%29%2A%28+1+%2B+r+%29%5E15+ ALIGN=MIDDLE  ALT=\"+200+=+P%280%29%2A%28+1+%2B+r+%29%5E15+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+200%2FP%280%29+=+%28+1+%2B+r+%29%5E15+ ALIGN=MIDDLE  ALT=\"+200%2FP%280%29+=+%28+1+%2B+r+%29%5E15+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2000+=+P%280%29%2A%28+1+%2B+r+%29%5E40+ ALIGN=MIDDLE  ALT=\"+2000+=+P%280%29%2A%28+1+%2B+r+%29%5E40+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2000%2FP%280%29+=+%28+1+%2B+r+%29%5E40+ ALIGN=MIDDLE  ALT=\"+2000%2FP%280%29+=+%28+1+%2B+r+%29%5E40+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+200%2FP%280%29+=+%281%2F10%29%2A%28+1+%2B+r+%29%5E40+ ALIGN=MIDDLE  ALT=\"+200%2FP%280%29+=+%281%2F10%29%2A%28+1+%2B+r+%29%5E40+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "----------------------------------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+1+%2B+r+%29%5E15+=+%281%2F10%29%2A%28+1+%2B+r+%29%5E40+ ALIGN=MIDDLE  ALT=\"+%28+1+%2B+r+%29%5E15+=+%281%2F10%29%2A%28+1+%2B+r+%29%5E40+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "divide both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+1+%2B+r+%29%5E15+ ALIGN=MIDDLE  ALT=\"+%28+1+%2B+r+%29%5E15+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1+=+%281%2F10%29%2A%28+1+%2B+r+%29%5E25+ ALIGN=MIDDLE  ALT=\"+1+=+%281%2F10%29%2A%28+1+%2B+r+%29%5E25+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+10+=+%28+1+%2B+r+%29%5E25+ ALIGN=MIDDLE  ALT=\"+10+=+%28+1+%2B+r+%29%5E25+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Take the log base 10 of both sides<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1+=+25%2Alog%28+1+%2B+r+%29+ ALIGN=MIDDLE  ALT=\"+1+=+25%2Alog%28+1+%2B+r+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+log%28+1+%2B+r+%29+=+.04+ ALIGN=MIDDLE  ALT=\"+log%28+1+%2B+r+%29+=+.04+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1+%2B+r+=+10%5E.04+ ALIGN=MIDDLE  ALT=\"+1+%2B+r+=+10%5E.04+\"   DISABLED_style= \"max-width:90%; height:auto;\" > ( I'll refer back to this step )<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1+%2B+r+=+1.09648+ ALIGN=MIDDLE  ALT=\"+1+%2B+r+=+1.09648+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+r+=+.09648+ ALIGN=MIDDLE  ALT=\"+r+=+.09648+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "To find doubling period:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2P%280%29+=+P%280%29%2A%28+1+%2B+r+%29%5Et+ ALIGN=MIDDLE  ALT=\"+2P%280%29+=+P%280%29%2A%28+1+%2B+r+%29%5Et+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2+=+%28+1+%2B+r+%29%5Et+ ALIGN=MIDDLE  ALT=\"+2+=+%28+1+%2B+r+%29%5Et+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Take log base 10 of both sides<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+log%282%29+=+t%2Alog%28+10%5E.04+%29+ ALIGN=MIDDLE  ALT=\"+log%282%29+=+t%2Alog%28+10%5E.04+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > ( from the above mentioned step )<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.30103+=+t%2A.04+ ALIGN=MIDDLE  ALT=\"+.30103+=+t%2A.04+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+7.526+ ALIGN=MIDDLE  ALT=\"+t+=+7.526+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "The doubling period is 7.526 min<BR>\n" );
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document.write( "Get another opinion if needed<BR>\n" );
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