document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=165425>Question 165425</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0395771188/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> A ball is thrown directly upward from ground level with an initial speed of 80ft/s. How high will it go? When will it return to the ground? use the formula h = vt - 16t^2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #121931 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=121931\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A ball is thrown directly upward from ground level with an initial speed of 80ft/s. How high will it go? When will it return to the ground? use the formula h = vt - 16t^2<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "h = zero when the ball hits the ground.<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "Since v = 80 ft/second. you get:<BR>\n" );
document.write( "-16t^2+80t = 0<BR>\n" );
document.write( "-16t(t-5) = 0<BR>\n" );
document.write( "t = 0 or t = 5<BR>\n" );
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document.write( "It started at the ground at t=0 seconds<BR>\n" );
document.write( "It will be back on the ground at t = 5 seconds<BR>\n" );
document.write( "===================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );