For the given arithmetic series, what is Sn?a1 = 21, d = -5, and n = 16

A. -1056
B. -264
C. -528
D. -243


Answer: B

Mathematics

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A. 2940 students B. 84 students C. 2104 students D. 2184 students

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A. 8 B. 4 C. 18 D. 9

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