document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1047394>Question 1047394</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Z varies directly as the square of x and inversely as the square root of y. Find the percentage change in z if x increases by 20% and y decreases by 19%. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #662910 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=662910\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> z=kx^2*y^(-1/2)<BR>\n" );
document.write( "z new=k(1.2x)^2*(0.81y)^(-1/2)<BR>\n" );
document.write( "The ratio has the k cancel, and it is 1.44/(1/0.9), for 1.2^2=1.44 and 1/sqrt(0.81)=1/0.9.<BR>\n" );
document.write( "That is 1.44*0.9=1.296<BR>\n" );
document.write( "29.6% increase. </SPAN>\n" );
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