document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=329730>Question 329730</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If a man throws a wrench from a height of 128 feet with an initial velocity of 32 feet per second, what is the height of the wrench after 1 second? How long does it take for the wrench to reach the ground? The height of the wrench above the groundafter t seconds is given by S(t)=-16t-32t+128 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #236412 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=236412\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If a man throws a wrench from a height of 128 feet with an initial velocity of 32 feet per second, what is the height of the wrench after 1 second? How long does it take for the wrench to reach the ground? The height of the wrench above the groundafter t seconds is given by S(t)=-16t-32t+128 *** It's -16t^2<BR>\n" );
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document.write( "S(t)=-16t^2-32t+128<BR>\n" );
document.write( "S(1) = -16*1 - 32*1 + 128<BR>\n" );
document.write( "S(1) = 80 feet<BR>\n" );
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document.write( "S(t)=-16t^2-32t+128 = 0<BR>\n" );
document.write( "t^2 + 2t - 8 = 0<BR>\n" );
document.write( "(t-4)*(t+2) = 0<BR>\n" );
document.write( "t = 4 seconds<BR>\n" );
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