document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=154725>Question 154725</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0495012661/algebrahomeworkh>college algebra ninth edition</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> A doctor  prescribes an oitment that is 2% hydrocortisone. A pharmacist has 1% and 5% concentrations in stock. How much of each should she use to make a 1-ounce tube </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #113935 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=113935\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A doctor  prescribes an ointment that is 2% hydrocortisone. A pharmacist has 1% and 5% concentrations in stock. How much of each should she use to make a <BR>\n" );
document.write( "1-ounce tube.<BR>\n" );
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document.write( "Let amt. of 1% be x: amt. of active ingredient = (0.01x) oz.<BR>\n" );
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document.write( "Amt of 5% is \"1-x\" ; amt. of active ingredient = 0.05(1-x) = (0.05 - 0.05x) oz. <BR>\n" );
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document.write( "Amt of 2% is 1 oz; amt. of active ingredient = 0.02*1 = 0.02 oz<BR>\n" );
document.write( "EQUATION:<BR>\n" );
document.write( "acive + active = active<BR>\n" );
document.write( "Active Ingredient equation: 0.01x + 0.05 - 0.05x = 0.02*1<BR>\n" );
document.write( "-0.04x = -0.03<BR>\n" );
document.write( "x = 0.75 oz (amt. of 1% ointment in the mix)<BR>\n" );
document.write( "1-0.75 = 0.25 oz (amt. of 5% ointment in the mix)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
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