document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1109113>Question 1109113</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You want to photograph the moon over a lake at night. your camera allows for time exposures of up to 10s in half-second increments, and the lens has 7 aperture settings, or f/stops. How many different ways could you set the exposure for the photograph? \r<BR>\n" );
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document.write( "Class: Grade 12 Data Management  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #724142 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=724142\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> you have 10 / (1/2) = 20 time settings.<BR>\n" );
document.write( "you have 7 aperture settings.\r<BR>\n" );
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document.write( "the total number of different ways you could set the exposure for the photograph would be 20 * 7 = 140.\r<BR>\n" );
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document.write( "to see how this works, assume only 3 time settings and 2 aperture settings.\r<BR>\n" );
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document.write( "let the time settings be 1,2,3<BR>\n" );
document.write( "let the aperture settings be f1, f2\r<BR>\n" );
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document.write( "total exposure setting would be 3 * 2 = 6.\r<BR>\n" );
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document.write( "they would be:\r<BR>\n" );
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document.write( "1f1, 1f2, 1f3<BR>\n" );
document.write( "2f1, 2f2, 2f3\r<BR>\n" );
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document.write( "the same logic applies for 20 time settngs and 7 aperture settings, but there would be 140 of them, rather than just 6 in our example.\r<BR>\n" );
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document.write( "with time setting of 1/2 second, your aperture settings could be f1, f2, f3, f4, f5, f6, f7.\r<BR>\n" );
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document.write( "with time setting of 1 second, your aperture settings could be f1, f2, f3, f4, f5, f6, f7.\r<BR>\n" );
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document.write( "etc....., in time setting of 1/2 second increments up to a time setting of 10 seconds.\r<BR>\n" );
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document.write( "a time setting of 0 seconds is not included, since that would not be possible.\r<BR>\n" );
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document.write( "the lowest time setting is therefore 1/2 second and the highest time setting is 10 seconds.\r<BR>\n" );
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