The cost, in thousands of dollars, of airing x 30-second television commercials during a major football game can be approximated by C(x) = 20 + 5,000x + 0.058. How many 30-second television commercials should your company air to minimize average costs? HINT [See Example 1.1 Ems What is the resulting average cost of a 30-second ad? : thousand dollars per ad