document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=393268>Question 393268</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a model for the path of a toy rocket is given by h=68t-4.9t(t), where h is the altitude in meters and t is the time in seconds. Explain how to find both the maximum altitude of the rocket andhow long it takes to reach that altitude. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #279131 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=279131\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  a model for the path of a toy rocket is given by h=68t-4.9t(t), where h is the altitude in meters and t is the time in seconds. Explain how to find both the maximum altitude of the rocket and how long it takes to reach that altitude.<BR>\n" );
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document.write( "There are several ways to find the max of min of a quadratic equation.<BR>\n" );
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document.write( "Max occurs when t = -b/2a<BR>\n" );
document.write( "t = -b/2a = -68/(2*-4.9) = 6.93 seconds<BR>\n" );
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document.write( "Max altitude = h(6.93) = 68(6.93)-4.9(6.93^2) = 235.92 meters<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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