document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=140440>Question 140440</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0201525267/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> a stone is dropped from a cliff. In the 4 sec, the sound of the stone striking the ground reaches the top of the cliff. If we assume that the speed of sound is 1100 ft/sec, how high is the cliff? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #102272 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=102272\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let f=\"time to fall\" and s=\"time for sound\"\r<BR>\n" );
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document.write( "gravitational acceleration is 32ft/sec^2 __ h=.5(32)f^2=16f^2 __ sqrt(h)=4f __ (sqrt(h))/4=f\r<BR>\n" );
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document.write( "s=h/1100\r<BR>\n" );
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document.write( "s+f=4\r<BR>\n" );
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document.write( "substituting __ h/1100+(sqrt(h))/4=4 __ h+275(sqrt(h))=4400 __ h+275(sqrt(h))-4400=0\r<BR>\n" );
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document.write( "use quadratic formula to find sqrt(h) __ square result to find h </SPAN>\n" );
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