Question 918925
 demand = p = -1/20x+1,030.
R(x) = px = (-1/20)x^2 + 1030x
P(x) = R(x) - C(x)
P(x) = (-1/20)x^2 + 1030x - (150x + 3000)
P(x) = (-1/20)x^2 + 880x - 3000