document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1122287>Question 1122287</A>: <I><SPAN STYLE=\"word-break: break-all;\">  7. A toy rocket is launched vertically from 5 feet above ground level with an initial velocity of 112 feet per second. The height h after t seconds is given by the equation: h(t) = -16t^2 + 112t + 5  \r<BR>\n" );
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document.write( "a. How long will it take for the rocket to return to the ground? \r<BR>\n" );
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document.write( "b.  After how many seconds will the rocket be 100 feet above the ground? \r<BR>\n" );
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document.write( "c. How long will it take for the rocket to reach maximum height? What is the maximum height?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #738359 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=738359\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  A toy rocket is launched vertically from 5 feet above ground level with an initial velocity of 112 feet per second. The height h after t seconds is given by the equation: h(t) = -16t^2 + 112t + 5  \r<BR>\n" );
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document.write( "a. How long will it take for the rocket to return to the ground? <BR>\n" );
document.write( "h(t) = -16t^2 + 112t + 5 = 0<BR>\n" );
document.write( "Solve for t<BR>\n" );
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document.write( "b.  After how many seconds will the rocket be 100 feet above the ground?<BR>\n" );
document.write( "h(t) = -16t^2 + 112t + 5 = 100<BR>\n" );
document.write( "Solve for t<BR>\n" );
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document.write( "c. How long will it take for the rocket to reach maximum height?<BR>\n" );
document.write( "It's the vertex of the parabola h(t) = -16t^2 + 112t + 5<BR>\n" );
document.write( " What is the maximum height?  </SPAN>\n" );
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