document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=38619>Question 38619</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A ship using sound-sensing devices above and below water recorded a surface explosion 39 seconds sooner on its underwater device than on its above-water device. If sound travels in air at about 1100 feet per second and in water at about 5000 feet per second, how far away was the explosion? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #24170 by </B><A HREF=/tutors/aboutme.mpl?userid=Paul><B>Paul(988)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Paul><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=24170\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Letting t be the time:<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "1100t=5000(t-39)<BR>\n" );
document.write( "-3900t=-195000<BR>\n" );
document.write( "t=50<BR>\n" );
document.write( "Hence, the explosion is 50ft far away.<BR>\n" );
document.write( "Paul. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );