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The seating for an outdoor stage is arranged such that there are 11 seats in the first row. For each additional row after the first

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The seating for an outdoor stage is arranged such that there are 11 seats in the first row. For each additional row after the first row, there are 3 more seats than there are in the previous row. If there are 30 rows altogether, how many seats are there in all? Select one: A. 1470 . B. 1635 C. 2940 D. 3270

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