document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=181015>Question 181015</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a health clinic uses a solution of bleach to sterilize petri dishes in which cultures are grown. The sterilization tank contains 100 gal of a solution of 2% ordinary household bleach mixed with pure distilled water. New research indicates that the concentration of bleach should be 5% for complete sterilization. How much of the solution should be drained and replaced with bleach to increase the bleach content to the recommended level? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #135679 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=135679\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a health clinic uses a solution of bleach to sterilize petri dishes in which cultures are grown.<BR>\n" );
document.write( "------------------------------------- <BR>\n" );
document.write( "The sterilization tank contains 100 gal of a solution of 2% ordinary household bleach mixed with pure distilled water. <BR>\n" );
document.write( "-------------------------------------<BR>\n" );
document.write( "New research indicates that the concentration of bleach should be 5% for complete sterilization. <BR>\n" );
document.write( "-------------------------------------<BR>\n" );
document.write( "How much of the solution should be drained and replaced with bleach to increase the bleach content to the recommended level?<BR>\n" );
document.write( "-------------------------------------<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "bleach -bleach + bleach = bleach<BR>\n" );
document.write( "0.02*100 -0.02x + x = 0.05(100)\r<BR>\n" );
document.write( "\n" );
document.write( "Multiply thru by 100 to get:<BR>\n" );
document.write( "2*100 - 2x + 100x = 5*100<BR>\n" );
document.write( "98x = 300<BR>\n" );
document.write( "x = 3.06 gallons<BR>\n" );
document.write( "=====================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );