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Helga [31]
3 years ago
9

Please help fast ill give 10 points along with brainlist answer only if you know!!!

Mathematics
1 answer:
vovikov84 [41]3 years ago
8 0

Answer:

C. 780

Step-by-step explanation:

C(n) = 500 + 4n     n = number of students attending = 70

C(70) = 500 + (4*70)

C(70) = 500 + 280

C(70) = 780

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