document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=30391>Question 30391</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello <BR>\n" );
document.write( "  I need help with a solution problem. I can not seem to put this thing together.<BR>\n" );
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document.write( " A pharmacist is  to prepare 15 milliliters of special eye drops for a glaucoma patient. The eye-drop solution must have a 2% active ingredient, but the pharmacist only has 10% solution and 1% solution in stock. How much of each type of solution should be used to fill the prescription.<BR>\n" );
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document.write( "Help with this will be greatly appreciated, I am lost on this one.\r<BR>\n" );
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document.write( "Thanks<BR>\n" );
document.write( "   Terry </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #17094 by </B><A HREF=/tutors/aboutme.mpl?userid=longjonsilver><B>longjonsilver(2297)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=longjonsilver><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=longjonsilver><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=17094\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> First off, real my Lesson on this website on how to do this type of question.\r<BR>\n" );
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document.write( "Second, just looking at the question, we have some 10% and some 1% that mix to make a 2% solution.\r<BR>\n" );
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document.write( "Just by common sense, we will need more of the 1% solution, since the final answer is a 2% solution. Hoepfully that makes sense? We expect a lot more of the 1% solution to be used.\r<BR>\n" );
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document.write( "Right...<BR>\n" );
document.write( "Let x = amount of 1% solution used.<BR>\n" );
document.write( "So, how much of 10% is used? Answer is (15-x) --> ie everything else to make up the final 15ml.\r<BR>\n" );
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document.write( "BEFORE: x of 1% AND (15-x) of 10%<BR>\n" );
document.write( "--> 0.01x + 0.10(15-x)\r<BR>\n" );
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document.write( "AFTER: 15ml of 2%<BR>\n" );
document.write( "--> 0.02*15\r<BR>\n" );
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document.write( "And being a mixture, the BEFORE has to equal the AFTER:<BR>\n" );
document.write( "0.01x + 0.10(15-x) = 0.02*15<BR>\n" );
document.write( "0.01x + 1.5 - 0.10x = 0.30<BR>\n" );
document.write( "-0.09x = -1.2<BR>\n" );
document.write( "x = -1.2/-0.09<BR>\n" );
document.write( "x = 13.3333 ml\r<BR>\n" );
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document.write( "and so there are 13.3333ml of the 1% solution and 1.6666ml of the 10% solution.\r<BR>\n" );
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document.write( "jon.<BR>\n" );
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