document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=420514>Question 420514</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A submarine is traveling at 9 m.p.h. and is descending at an angle of depression of 5 degrees, how many minutes does it take for the submarine to reach 120 feet?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #293842 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=293842\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A submarine is traveling at 9 m.p.h. and is descending at an angle of depression of 5 degrees, how many minutes does it take for the submarine to reach 120 feet?\r<BR>\n" );
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document.write( "let x=minutes it takes submarine to reach a depth of 120 ft.<BR>\n" );
document.write( "What we have here is a right triangle with a leg of 120 ft opposite the 5 deg angle and h=hypotenuse.\r<BR>\n" );
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document.write( "sin 5 deg = 120/h<BR>\n" );
document.write( "h=120/sin 5 deg=1376.85 ft<BR>\n" );
document.write( "travel time = distance/speed<BR>\n" );
document.write( "x=(1376.85 ft/9 mi/hr)*(mi/5280 ft)*(60min/hr)<BR>\n" );
document.write( " =1376.85*60/9*5280<BR>\n" );
document.write( " =1.74 minutes<BR>\n" );
document.write( "ans:<BR>\n" );
document.write( "It takes the submarine 1.74 minutesto reach a depth of 120 ft. </SPAN>\n" );
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