Use the revenue and cost functions below, to answer parts (A), (B), and (C).
R(x) = 80x - 3x^2 1 ≤ x ≤ 20
C(x) = 120 + 16x 1 ≤ x ≤ 20
(A) What is the profit function?
P(x) = -3x^2 + 64x - 120
What is the domain of the profit function?
A. [0,80]
B. [0,216]
C. [0,20]
D. [1,20]