document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=199107>Question 199107</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 ) = -16t2 + 64, where t is the number of seconds after it is dropped. Find h(1). How long does it take for 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 #149584 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=149584\">put this solution on YOUR website!</A><BR><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 ) = -16t2 + 64, where t is the number of seconds after it is dropped. Find h(1). How long does it take for the ball to fall to the earth?<BR>\n" );
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document.write( "h(1) = -16 + 64 = 48 feet<BR>\n" );
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document.write( "Set h = 0 to find when it impacts<BR>\n" );
document.write( "0 = -16t^2 + 64<BR>\n" );
document.write( "t^2 = 4<BR>\n" );
document.write( "t = 2 seconds (ignore the -2) </SPAN>\n" );
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