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- In horse racing, a “trifecta” occurs when a bettor wins by selecting the first three finishers in the exact order (1 St place, 2nd place, and 3rd place). How many different trifectas are possible if there are 14 horses in a race?A theater hall has n rows of seats. The first row has 25 seats, the second row has 33 seats, and the third row has 41 seats. If the same pattern continues, which expression represents the number of seats in the n th row of the theater hall?What is the sum if −79.9is added to the difference of 45.9 and 7?
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