document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1187719>Question 1187719</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The altitude, A, of an airplane follows a linear model given by:<BR>\n" );
document.write( "A = mt + b<BR>\n" );
document.write( "Where t is the time in seconds after taking off. 5 seconds after taking off from the ground, the plane is 1200ft above sea level and 60 seconds after take-off, the plane is 3400ft above sea level.<BR>\n" );
document.write( "a) Solve for m and b<BR>\n" );
document.write( "b) How high is the ground above sea level? (Hint: the plane is on the ground just before take-off)<BR>\n" );
document.write( "c) Find rate of altitude increase over period 0 < t < 775? Both less than should be less than or equal to. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #818758 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=818758\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The altitude, A, of an airplane follows a linear model given by:<BR>\n" );
document.write( "A = mt + b<BR>\n" );
document.write( "Where t is the time in seconds after taking off. <BR>\n" );
document.write( "-----<BR>\n" );
document.write( "5 seconds after taking off from the ground, the plane is 1200ft above sea level and 60 seconds after take-off, the plane is 3400ft above sea level.<BR>\n" );
document.write( "1200 = 5m + b<BR>\n" );
document.write( "3400 = 60m + b<BR>\n" );
document.write( "------------------------ Subtract<BR>\n" );
document.write( "-2200 = -55m<BR>\n" );
document.write( "m = 40 ft/sec<BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "a) Solve for m and b<BR>\n" );
document.write( "Sub for m and find b<BR>\n" );
document.write( "------------<BR>\n" );
document.write( "b) How high is the ground above sea level?<BR>\n" );
document.write( "That's b.<BR>\n" );
document.write( "We don't need hints.<BR>\n" );
document.write( "=============================<BR>\n" );
document.write( " (Hint: the plane is on the ground just before take-off)<BR>\n" );
document.write( "===================================<BR>\n" );
document.write( "c) Find rate of altitude increase over period 0 < t < 775? Both less than should be less than or eq<BR>\n" );
document.write( "That's m. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );