document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1088660>Question 1088660</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A projectile is fired vertically upward and its height s(t) in feet after t seconds is given by the function defined by s(t) = -16t^2 + 800t + 600. After how many seconds will the projectile be 5000 ft 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 #702981 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=702981\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A projectile is fired vertically upward and its height s(t) in feet after t-seconds is given by the function defined by s(t) = -16t^2 + 800t + 600. After how many seconds will the projectile be 5000 ft above the ground? <BR>\n" );
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document.write( "Solve::<BR>\n" );
document.write( "-16t^2+800t + 600 = 5000<BR>\n" );
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document.write( "-16t^2 + 800t - 4400 = 0<BR>\n" );
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document.write( "t^2 - 50t + 275 = 0<BR>\n" );
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document.write( "time on the way up = 6.2917 sec or time on the way down = 43.7083 sec<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " </SPAN>\n" );
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