Suppose the total cost C(x) (in dollars) to manufacture a quantity x of weed killer (in hundreds of liters) is given by the function C(x) = x -2x +6x + 60, where x> 0 a) Where is C(x) decreasing? b) Where is C(x) increasing? UJ ULIVEL HIV LUIIVEL WIIVILL . O A. The function is decreasing on the open interval(s) Type your answer in interval notation. Simplify your answer. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.) O B. The function is never decreasing b) Select the correct choice below and fill in any answer boxes within your choice. O A. The function is increasing on the open interval(s) (Type your answer in interval notation. Simplify your answer. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed) O B. The function is never increasing