document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1101446>Question 1101446</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A ball is thrown vertically upward. After t seconds, its height <BR>\n" );
document.write( "h (in feet) is given by the function h(t)=48t-16t^2<BR>\n" );
document.write( "After how long will it reach its 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 #716031 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=716031\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A ball is thrown vertically upward. After t seconds, its height <BR>\n" );
document.write( "h (in feet) is given by the function h(t)=48t-16t^2<BR>\n" );
document.write( "After how long will it reach its maximum height?<BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "Without calculus:<BR>\n" );
document.write( "The max is the vertex of the parabola.<BR>\n" );
document.write( "That's at t = -b/2a = -48/-32 = 1.5 seconds<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );