document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=222093>Question 222093</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Time of Descent:<BR>\n" );
document.write( "A submarine traveling at 240 mph is descending at an angle of depression of 5 degees. How many minutes, to the nearest tenth, does it take the submarine to reach a depth of 80 feet?   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #166398 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=166398\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A submarine traveling at 240 mph is descending at an angle of depression of 5 degees. How many minutes, to the nearest tenth, does it take the submarine to reach a depth of 80 feet? <BR>\n" );
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document.write( "Starting from what depth?<BR>\n" );
document.write( "Subs don't go 240 mph.  Nothing in the water does.<BR>\n" );
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document.write( "I'll assume you mean from the surface, and accept the 240 mph (subs don't use mph, either, they use knots). Jeez<BR>\n" );
document.write( "240 * sin(5º) = ~20.917 mph vertical<BR>\n" );
document.write( "= 20/917*(22/15) ft/sec = 30.679 ft/sec vertical<BR>\n" );
document.write( "80/30.679 = ~ 2.608 seconds<BR>\n" );
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