document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=954484>Question 954484</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A toy rocket is launched from the top of a building 340 feet tall at an initial velocity of 80 feet per second. The height of the rocket t seconds after launch is given by the equation s(t)=-16t^2+80t+340. When does the rocket reach its 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 #582947 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=582947\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A toy rocket is launched from the top of a building 340 feet tall at an initial velocity of 80 feet per second. The height of the rocket t seconds after launch is given by the equation s(t)=-16t^2+80t+340. When does the rocket reach its maximum height? What is the maximum height?<BR>\n" );
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document.write( "Maximum height occurs when t = -b/2a<BR>\n" );
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document.write( "t = -80/(2*-16) = 2.5 seconds<BR>\n" );
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document.write( "Max height = s(2.5) = -16(2.5)^2 + 80(2.5) + 340 = 442.5 ft<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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