document.write( "Question 1204026: The windows of a downtown office building are arranged so that each floor has six fewer windows than the floor below it. If the ground floor has 52 windows, how many total windows are on the first eight floors \n" ); document.write( "

Algebra.Com's Answer #840008 by ikleyn(52790) $\"\"$ $\"About$

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\n" ); document.write( "The windows of a downtown office building are arranged so that each floor
\n" ); document.write( "has six fewer windows than the floor below it. If the ground floor has 52 windows,
\n" ); document.write( "how many total windows are on the first eight floors
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document.write( "First floor has 52 windows.\r\n" );
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document.write( "Eighth floor has 52 - (8-1)*6 = 52 - 7*6 = 52 - 42 = 10 windows  \r\n" );
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document.write( "       (use the formula for for the n-th term of an arithmetic progression).\r\n" );
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document.write( "The total windows is the sum of an arithmetic progression\r\n" );
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document.write( "    W =  = 248   ANSWER\r\n" );
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document.write( "       (use the formula for the sum of an arithmetic progression W = .\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved, with explanations.\r
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\n" ); document.write( "\n" ); document.write( "For introductory lessons on arithmetic progressions see \r
\n" ); document.write( "\n" ); document.write( "    - Arithmetic progressions\r
\n" ); document.write( "\n" ); document.write( "    - The proofs of the formulas for arithmetic progressions \r
\n" ); document.write( "\n" ); document.write( "    - Problems on arithmetic progressions \r
\n" ); document.write( "\n" ); document.write( "    - Word problems on arithmetic progressions\r
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\n" ); document.write( "\n" ); document.write( "Find there everything yo need, and
\n" ); document.write( "learn from there everything you need.\r
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