document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=141837>Question 141837</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The focal length f for a camera lens is related to the object distance 0 and the image distance i by the formula <BR>\n" );
document.write( "l = l + l<BR>\n" );
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document.write( "f = 0 + i                                   \r<BR>\n" );
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document.write( "f = 250 mm and 0 = 2,000,000<BR>\n" );
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document.write( "l   =     l        +   l<BR>\n" );
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document.write( "250  =  2,000,000   +   i\r<BR>\n" );
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document.write( "Use the formula to findthe image distance i for an object that is 2,000,000 mm from a 250-mm telephoto lens.\r<BR>\n" );
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document.write( "Please help. I'm not sure if I have this set up correctly or how to proceed. Thank you, Anne </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #103349 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=103349\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> l        l            1<BR>\n" );
document.write( "---  = ---------- + --------<BR>\n" );
document.write( "250    2,000,000      i\r<BR>\n" );
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document.write( "If your equation is correct you can solve for \"i\":\r<BR>\n" );
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document.write( "1/i = [1/250] -[1/2mil]<BR>\n" );
document.write( "1/i = [2mil - 250]/[500 mil]\r<BR>\n" );
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document.write( "Inverting both sides you get:\r<BR>\n" );
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document.write( "i = [500 mil]/[2mil-250]\r<BR>\n" );
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document.write( "i = [500 mil] / [1.5mil]\r<BR>\n" );
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document.write( "i = 333 1/3 million<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
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