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Posted by **sueann** on Wednesday, May 30, 2012 at 12:18am.

- Trig -
**Reiny**, Wednesday, May 30, 2012 at 7:18amFor terms from 1 to 40 you have an arithmetic series, where

a = 25, d=2 and n = 40

sum of those seats = (40/2)(2(25) + 39(2) )

= 2560

then there are 35 rows of 125 seats each or 4375 seats

so we have 6935 seats

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