document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1140570>Question 1140570</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A toy rocket is launched from the top of a building 144 feet tall at an initial velocity of 208 feet per second.<BR>\n" );
document.write( "​a) Give the function that describes the height of the rocket in terms of time t.<BR>\n" );
document.write( "​b) Determine the time at which the rocket reaches its maximum​ height, and the maximum height in feet.<BR>\n" );
document.write( "​c) For what time interval will the rocket be more than 259 feet above ground​ level?<BR>\n" );
document.write( "​d) After how many seconds will it hit the​ ground?\r<BR>\n" );
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document.write( "I have part A down as s(t)= -16t^2+208t+144 but I can't find out how to do part b which is needed for the rest of the parts. Help please! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #761094 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=761094\">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 144 feet tall at an initial velocity of 208 feet per second.<BR>\n" );
document.write( "​a) Give the function that describes the height of the rocket in terms of time t.<BR>\n" );
document.write( "​b) Determine the time at which the rocket reaches its maximum​ height, and the maximum height in feet.<BR>\n" );
document.write( "​c) For what time interval will the rocket be more than 259 feet above ground​ level?<BR>\n" );
document.write( "​d) After how many seconds will it hit the​ ground?\r<BR>\n" );
document.write( "\n" );
document.write( "--------------<BR>\n" );
document.write( "I have part A down as s(t)= -16t^2+208t+144 but I can't find out how to do part b which is needed for the rest of the parts. Help please!<BR>\n" );
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document.write( "It's a parabola.<BR>\n" );
document.write( "The max height is the vertex. </SPAN>\n" );
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