document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=480853>Question 480853</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An object is thrown upward from the top of a 160 foot building with an initial velocity of 48 feet per second. The height h of the object after t seconds is given by the quadratic equation h= 16t2+48t+160. When will the object hit 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 #329260 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=329260\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> h=0 when it reaches the terrace height on its way down\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+h=+16t%5E2+%2B+48t+%2B+160 ALIGN=MIDDLE  ALT=\"+h=+16t%5E2+%2B+48t+%2B+160\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+0=+16t%5E2+%2B+48t+%2B+160 ALIGN=MIDDLE  ALT=\"+0=+16t%5E2+%2B+48t+%2B+160\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+0=+t%5E2+%2B+3t+%2B+10 ALIGN=MIDDLE  ALT=\"+0=+t%5E2+%2B+3t+%2B+10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "solve using quadratic formula<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ ALIGN=MIDDLE  ALT=\"t+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=+1 ALIGN=MIDDLE  ALT=\"a+=+1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b+=+3 ALIGN=MIDDLE  ALT=\"b+=+3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=c+=+10 ALIGN=MIDDLE  ALT=\"c+=+10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+%28-3+%2B-+sqrt%28+3%5E2-4%2A1%2A10+%29%29%2F%282%2A1%29+ ALIGN=MIDDLE  ALT=\"t+=+%28-3+%2B-+sqrt%28+3%5E2-4%2A1%2A10+%29%29%2F%282%2A1%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+%28-3+%2B-+sqrt%28+9+-+40+%29%29%2F2+ ALIGN=MIDDLE  ALT=\"t+=+%28-3+%2B-+sqrt%28+9+-+40+%29%29%2F2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The square root is  negative which is absurd.<BR>\n" );
document.write( "The equation should be <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+h+=+-16%5E2+%2B+48t+%2B+160 ALIGN=MIDDLE  ALT=\"+h+=+-16%5E2+%2B+48t+%2B+160\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+0+=+-t%5E2+%2B+3t+%2B+10 ALIGN=MIDDLE  ALT=\"+0+=+-t%5E2+%2B+3t+%2B+10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "a = -1,b = 3,c = 10<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+%28-3+%2B-+sqrt%28+3%5E2-4%2A%28-1%29%2A10+%29%29%2F%282%2A%28-1%29%29+ ALIGN=MIDDLE  ALT=\"t+=+%28-3+%2B-+sqrt%28+3%5E2-4%2A%28-1%29%2A10+%29%29%2F%282%2A%28-1%29%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+%28-3+%2B-+sqrt%28+9+%2B+40+%29%29%2F-2+ ALIGN=MIDDLE  ALT=\"t+=+%28-3+%2B-+sqrt%28+9+%2B+40+%29%29%2F-2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+%28-3+%2B+7%29%2F-2 ALIGN=MIDDLE  ALT=\"t+=+%28-3+%2B+7%29%2F-2\"   DISABLED_style= \"max-width:90%; height:auto;\" > (ignore negative number)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+%28-3+-7%29%2F-2 ALIGN=MIDDLE  ALT=\"t+=+%28-3+-7%29%2F-2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "t = 5<BR>\n" );
document.write( "The object will hit the ground in 5 sec<BR>\n" );
document.write( "m.ananth@hotmail.ca </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );