cost Taniction C (q) = 93 - 3092 + 400q +500 PROFITABILITY In Exercises 59 through 62, the demand function p = D(x) and the total cost function C(x) for a particular commodity are given in terms of the level of production x. In each case, find: (a) The revenue R(x) and profit P(x). (b) All values of x for which production of the commodity is profitable. 59. D(x) = -0.02x + 29 C(x) = 1.43x2+ 18.3x + 15.6 60. D(x) = -0.37x + 47 C(x) = 1.38x2 + 15.15x + 115.5 61. D(x) = -0.5x + 39 C(x) = 1.5x2 + 9.2x + 67 62. D(x) = -0.09x + 51 C(x) = 1.32x2 + 11.7x + 101.4 63. DISTRIBUTION COST Suppose that the number of worker-hours required to distribute new telephone books to x% of the households in a certain rural community is given by the function 600x W(x ) 300 - X h(x) and g(u) a. What is the domain of the function W? b. For what values of x does W(x) have a practical interpretation in this context? c. How many worker-hours were required to O m C 81 F ~ 9 0 6 4 6 /