document.write( "Question 1161258: S is an arithmetic series.\r
\n" ); document.write( "\n" ); document.write( "S12 = 150\r
\n" ); document.write( "\n" ); document.write( "S25 = 875\r
\n" ); document.write( "\n" ); document.write( "What is the value of S40? Round to 2 decimal places.
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Algebra.Com's Answer #784804 by MathTherapy(10552)\"\" \"About 
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