If revenue is R(x) = 3x^2 + 36x + 5, what is the marginal revenue at x = 15?
A126
B90
C131
D81
Answer & Solution
Correct answer: A. 126
Marginal revenue is R'(x) = 6x + 36, which is 90 + 36 = 126 at x = 15.
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