document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=885241>Question 885241</A>: <I><SPAN STYLE=\"word-break: break-all;\">  The doubling period of a baterial population is 15 minutes. At time t = 90 minutes, the baterial population was 50000. Round your answers to at least 1 decimal place.\r<BR>\n" );
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document.write( "What was the initial population at time t = 0 ?  \r<BR>\n" );
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document.write( "Find the size of the baterial population after 4 hours </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #535033 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=535033\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The doubling period of a bacterial population is 15 minutes.<BR>\n" );
document.write( " At time t = 90 minutes, the bacterial population was 50000.<BR>\n" );
document.write( " Round your answers to at least 1 decimal place.<BR>\n" );
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document.write( "We can use the formula:<BR>\n" );
document.write( "A = Ao*2^(t/d); where:<BR>\n" );
document.write( "A = amt after t time<BR>\n" );
document.write( "Ao = initial amt (t=0)<BR>\n" );
document.write( "t = time period in question<BR>\n" );
document.write( "d = doubling time of substance<BR>\n" );
document.write( "In our problem<BR>\n" );
document.write( "d = 15 min<BR>\n" );
document.write( "t = 90 min<BR>\n" );
document.write( "A = 50000<BR>\n" );
document.write( "What was the initial population at time t = 0<BR>\n" );
document.write( "Ao * 2^(90/15) = 50000<BR>\n" );
document.write( "Ao * 2^6 = 50000<BR>\n" );
document.write( "We know 2^6 = 64<BR>\n" );
document.write( "64(Ao) = 50000<BR>\n" );
document.write( "Ao = 50000/64<BR>\n" );
document.write( "Ao = 781.25 is the initial population<BR>\n" );
document.write( " :<BR>\n" );
document.write( "Find the size of the bacterial population after 4 hours<BR>\n" );
document.write( "Change 4 hr to 240 min<BR>\n" );
document.write( "A = 781.25 * 2^(240/15<BR>\n" );
document.write( "A = 781.25 * 2^16<BR>\n" );
document.write( "A= 781.25 * 65536<BR>\n" );
document.write( "A = 51,199,218.75 after 4 hrs </SPAN>\n" );
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