document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=68905>Question 68905</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The height h in feet of an object after t seconds is given by the function \r<BR>\n" );
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document.write( "	h = –16t2 + 60t + 9.  \r<BR>\n" );
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document.write( "How long will it take the object to hit the ground?  Round your answer to the nearest thousandth.\r<BR>\n" );
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document.write( "I have come up with 3.894 sec. Is this correct???? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #49068 by </B><A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><B>tutorcecilia(2152)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><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=tutorcecilia><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=49068\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I agree with your answer.  <BR>\n" );
document.write( "I used the quadratic formula to solve for x.<BR>\n" );
document.write( "Let 0=–16t^2+60t+9<BR>\n" );
document.write( "Solve by using the quadratic formula:<BR>\n" );
document.write( "x=-.144 or x= +3.894436803.  <BR>\n" );
document.write( "Eliminate the negative answer.  <BR>\n" );
document.write( "Rounding the positive answer = 3.894<BR>\n" );
document.write( "Check by plugging 3.894 back into the original equation.<BR>\n" );
document.write( "The answer is very close to zero (.028224), so it checks out.<BR>\n" );
document.write( ".<BR>\n" );
document.write( " </SPAN>\n" );
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