document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1115031>Question 1115031</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If a ball is thrown straight up from the top of a building that is 407 feet high, the position in feet<BR>\n" );
document.write( "above the ground is given by the function s(t) = -16t^2 + 75t + 407 where t is the number of<BR>\n" );
document.write( "seconds elapsed.<BR>\n" );
document.write( "a. How high is the projectile after 3 seconds?<BR>\n" );
document.write( "b. How long will it take for the ball to reach a height of 450 feet above the ground? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #729953 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=729953\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If a ball is thrown straight up from the top of a building that is 407 feet high, the position in feet<BR>\n" );
document.write( "above the ground is given by the function s(t) = -16t^2 + 75t + 407 where t is the number of<BR>\n" );
document.write( "seconds elapsed.<BR>\n" );
document.write( "a. How high is the projectile after 3 seconds?<BR>\n" );
document.write( "Sub 3 for t.<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "b. How long will it take for the ball to reach a height of 450 feet above the ground?<BR>\n" );
document.write( "s(t) = -16t^2 + 75t + 407 = 450<BR>\n" );
document.write( "Solve for t.<BR>\n" );
document.write( "The smaller value is ascending, the greater is descending.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );