document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=247865>Question 247865</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A theater has 32 rows of seats. The first row has 24 seats. Each of the remaining rows increases by 2 seats. How many seats are there in the theater?\r<BR>\n" );
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document.write( "know: tn=32<BR>\n" );
document.write( "      a=24<BR>\n" );
document.write( "      r=2<BR>\n" );
document.write( "find: n\r<BR>\n" );
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document.write( "So wouldn't I use the formula tn=a(r) to the exponent n-1? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #180715 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=180715\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> this is arithmetic (not geometric) ___ d = 2 (not r)\r<BR>\n" );
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document.write( "1st row -- 24 ___ 32nd row -- 24 + 2(31) = 86\r<BR>\n" );
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document.write( "average ___ (24 + 86) / 2 = 55\r<BR>\n" );
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document.write( "32 * 55 = 1760 </SPAN>\n" );
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