document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=306548>Question 306548</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A ball was thrown in the air and I have the formula \r<BR>\n" );
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document.write( "h(t)=-4.9t(squared)+31t+1\r<BR>\n" );
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document.write( "31 is the initial velocity and 1 (meter) is the initail height<BR>\n" );
document.write( "i need to find the height after 1 second. i also need to find the time it is at ten feet.<BR>\n" );
document.write( "Do i use the quadradic formula and put the numbers in? if so, where do i put them in? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #219396 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=219396\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A ball was thrown in the air and I have the formula<BR>\n" );
document.write( "h(t)=-4.9t^2 + 31t + 1 <BR>\n" );
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document.write( "find the height after 1 second.<BR>\n" );
document.write( "Replace t with 1 in the above equation<BR>\n" );
document.write( "h(t) = -4.9(1^2) + 31(1) + 1<BR>\n" );
document.write( "h(t) = -4.9 + 31 + 1<BR>\n" );
document.write( "h(t) = 27.1 m after 1 sec<BR>\n" );
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document.write( "find the time it is at ten feet, I'm going to assume you mean 10 meters here<BR>\n" );
document.write( "-4.9t^2 + 31t + 1 = h(t)<BR>\n" );
document.write( "replace h(t) with 10, find t<BR>\n" );
document.write( "-4.9t^2 + 31t + 1 = 10<BR>\n" );
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document.write( "-4.9t^2 + 31t + 1 - 10 = 0<BR>\n" );
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document.write( "-4.9t^2 + 31t - 9 = 0<BR>\n" );
document.write( "Use the quadratic formula to find t<BR>\n" );
document.write( "a=-4.9; b=31; c=-9<BR>\n" );
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document.write( "You should get two solutions, t=.3 sec and t=6.05 sec<BR>\n" );
document.write( " one time when it's at 10m on the way up and, another solution for 10m on the way down </SPAN>\n" );
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