document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=459628>Question 459628</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The height, in feet, of an arrow is given by the equation h= -16tsquared +70t +7 where \"t\" is in seconds. How long will it take for the arrow to hit the ground? Please round your solution to the nearest tenth of a second. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #315174 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=315174\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The height, in feet, of an arrow is given by the equation <BR>\n" );
document.write( "h(t) = -16tsquared +70t +7 where \"t\" is in seconds. <BR>\n" );
document.write( "How long will it take for the arrow to hit the ground? <BR>\n" );
document.write( "Please round your solution to the nearest tenth of a second.<BR>\n" );
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document.write( "Height is zero when the arrow hits the ground.<BR>\n" );
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document.write( "-16tsquared +70t +7 = 0<BR>\n" );
document.write( "---<BR>\n" );
document.write( "t = [-70 +- sqrt(70^2-4*-16*7)]/(-32)<BR>\n" );
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document.write( "t = [-70 +- sqrt(5348)]/(-32)<BR>\n" );
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document.write( "Positive solution:<BR>\n" );
document.write( "t = 4.47 seconds<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( "t = [<BR>\n" );
document.write( " </SPAN>\n" );
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