document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=269068>Question 269068</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The price P for a watermelon varies directly with its<BR>\n" );
document.write( "weight w.<BR>\n" );
document.write( "a) Write a formula for this variation.<BR>\n" );
document.write( "b) If the price of a 30-pound watermelon is $4.20, then<BR>\n" );
document.write( "what is the price of a 20-pound watermelon? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #197208 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=197208\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The price P for a watermelon varies directly with its<BR>\n" );
document.write( "weight w.<BR>\n" );
document.write( "a) Write a formula for this variation.<BR>\n" );
document.write( "P = kw<BR>\n" );
document.write( "----------------------<BR>\n" );
document.write( "b) If the price of a 30-pound watermelon is $4.20, <BR>\n" );
document.write( "Use that fact to find \"k\":<BR>\n" );
document.write( "4.2 = k(30)<BR>\n" );
document.write( "k = 4.2/30<BR>\n" );
document.write( "k = 2.1/15<BR>\n" );
document.write( "k = 0.7/5<BR>\n" );
document.write( "k = 7/50<BR>\n" );
document.write( "So the Equation is P = (7/50)w<BR>\n" );
document.write( "-------------------------------------------<BR>\n" );
document.write( "then what is the price of a 20-pound watermelon?<BR>\n" );
document.write( "P = (7/50)(20)<BR>\n" );
document.write( "P = 14/5<BR>\n" );
document.write( "Price = $2.80<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" );