Find the absolute maximum and minimum, if either exists, for the function on the indicated interval. f(x)=x -15x4+63x +18 (A) [- 3, 8] (B) [- 3, 7] (C) [6, 8] . . . (A) Find the absolute maximum. Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. A. The absolute maximum is at x = (Use a comma to separate answers as needed.) O B. There is no absolute maximum.Save A company manufactures and sells x cellphones per week. The weekly price-demand and cost equations are given below. p = 400 - 0.1x and C(x) = 25,000 + 140x (A) What price should the company charge for the phones, and how many phones should be produced to maximize the weekly revenue? What is the maximum weekly revenue? The company should produce phones each week at a price of $. (Round to the nearest cent as needed.)