document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=271959>Question 271959</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A ball is dropped from a height of 64 feet.  Its height above the earth in feet is given by h(t)=-16t^2+64, where t is the number of seconds after it is dropped.  <BR>\n" );
document.write( "Find h(1).<BR>\n" );
document.write( "How long does it take the ball to fall to the earth? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #199007 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=199007\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A ball is dropped from a height of 64 feet. <BR>\n" );
document.write( "Its height above the earth in feet is given by h(t)=-16t^2+64, where t is the number of seconds after it is dropped. <BR>\n" );
document.write( "Find h(1) = -16 + 64 = 48 ft<BR>\n" );
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document.write( "How long does it take the ball to fall to the earth?<BR>\n" );
document.write( "The height will be zero at that time.<BR>\n" );
document.write( "Solve -16t^2+64 = 0<BR>\n" );
document.write( "-16t^2 = -64<BR>\n" );
document.write( "t^2 = 4<BR>\n" );
document.write( "Positive solution:<BR>\n" );
document.write( "t = 2 seconds<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );