document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1130980>Question 1130980</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The temperature at various times on a summer day at a resort in southern California is given in the following table. The variable t is the number of minutes after 6:00 A.M., and the variable T is the temperature in degrees Fahrenheit.<BR>\n" );
document.write( "t (min)	T (°F)<BR>\n" );
document.write( "20	62<BR>\n" );
document.write( "40	61<BR>\n" );
document.write( "80	67<BR>\n" );
document.write( "120	76<BR>\n" );
document.write( "160	81<BR>\n" );
document.write( "200	79<BR>\n" );
document.write( "240	84<BR>\n" );
document.write( "280	87<BR>\n" );
document.write( "320	84<BR>\n" );
document.write( "360	85<BR>\n" );
document.write( "400	78<BR>\n" );
document.write( "(a) Find a quadratic model for these data. (Round all numerical values to five decimal places.)<BR>\n" );
document.write( "T = </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #749031 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=749031\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> It is -0.00037x^2+0.20835x+55.15807<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28300%2C300%2C-40%2C600%2C-10%2C100%2C-0.00036x%5E2%2B0.20835x%2B55.15807%29 ALIGN=MIDDLE  ALT=\"graph%28300%2C300%2C-40%2C600%2C-10%2C100%2C-0.00036x%5E2%2B0.20835x%2B55.15807%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );