ver Chapters One and Two Question 14 of 19 This test: 50 point(s) possible This question: 6 point(s) possible The demand for a certain type of cosmetic is given by p = 420 -x, where p is the price in dollars when x units are demanded. (a) Find the revenue R(x) that would be obtained at a price p. (Hint: Revenue = Demand x Price) (b) Graph the revenue function R(x). (c) Find the price that will produce maximum revenue. (d) What is the maximum revenue? (a) The revenue function that would be obtained at a price p is R(x) =]. (b) To graph the revenue function R(x), first determine whether the parabola opens upward or downward. The parabola opens Choose the correct graph below. O A. O B. O c. OD. AR(X) AR(X) AR(X) AR(X) 50000- 50000- 50000- 50000- 40000- 40000- 40000- 40000- O 30000- 30000- 30000- 30000- 20000- 20000- 20000- 20000- 10000- 10000- 10000- 10000- 0 140 280 420 0 140 280 420 0 140 280 420 0 140 280 420 (c) The parabola has its vertex at (Simplify your answer.) The price that will produce maximum revenue is $ (Simplify your answer.) (d) The maximum revenue is $ (Simplify your answer.) Time Remainin