document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1013227>Question 1013227</A>: <I><SPAN STYLE=\"word-break: break-all;\"> . An airplane is flying 10,500 ft. above the ground. The angle of depression from the plane to the base of a tree<BR>\n" );
document.write( "is 13o<BR>\n" );
document.write( "50’. How far horizontally must the plane fly to be directly over the tree?\r<BR>\n" );
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document.write( "I've been trying to answer this question but I really don't understand it. I'm also not ale to attend the discussion. Can you help me? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #629661 by </B><A HREF=/tutors/aboutme.mpl?userid=MathTherapy><B>MathTherapy(10557)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathTherapy><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=MathTherapy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=629661\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> . An airplane is flying 10,500 ft. above the ground. The angle of depression from the plane to the base of a tree is 13o 50’. How far horizontally must<BR>\n" );
document.write( "the plane fly to be directly over the tree?\r<BR>\n" );
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document.write( "I've been trying to answer this question but I really don't understand it. I'm also not ale to attend the discussion. Can you help me?\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/display-illustration.mpl?tutor=MathTherapy&illustration_name=Travel_No_1013229\">.<BR>\n" );
document.write( "<PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">The horizontal distance (green broken line) the plane needs to travel to be directly above the tree<BR>\n" );
document.write( "is the same as the horizontal distance (green solid line) directly below the plane to the base of the tree. \r<BR>\n" );
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document.write( "Let that distance be D<BR>\n" );
document.write( "We then get: tan 13<sup>o</sup> 50’ = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=O%2FA ALIGN=MIDDLE  ALT=\"O%2FA\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "tan 13<sup>o</sup> 50’ = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10500%2FD ALIGN=MIDDLE  ALT=\"10500%2FD\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "D <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%22%2A%22 ALIGN=MIDDLE  ALT=\"%22%2A%22\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=matrix%281%2C2%2Ctan+13%5Eo%2C+%2250%27%22%29+=+10500 ALIGN=MIDDLE  ALT=\"matrix%281%2C2%2Ctan+13%5Eo%2C+%2250%27%22%29+=+10500\"   DISABLED_style= \"max-width:90%; height:auto;\" > ------- Cross-multiplying<BR>\n" );
document.write( "D, or distance plane needs to travel = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10500%2Fmatrix%281%2C2%2Ctan+13%5Eo%2C+%2250%27%22%29%29 ALIGN=MIDDLE  ALT=\"10500%2Fmatrix%281%2C2%2Ctan+13%5Eo%2C+%2250%27%22%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%2842641.2351%29 ALIGN=MIDDLE  ALT=\"highlight_green%2842641.2351%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > ft </SPAN>\n" );
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