Given:
R(x) = 58x - 0.3x^2
C(x) = 11x + 12
P(x) = R(x) - C(x)
Let's find P(x),
P(x) = R(x) - C(x)
= 58x - 0.3x^2 - (11x + 12)
= 58x - 0.3x^2 -11x - 12
P(x) = 47x - 0.3x^2 - 12
Therefore, P(x) = 47x - 0.3x^2 - 12 or -0.3x^2 + 47x - 12. The answer is letter C.