Credit cards are included in M2

If the total cost incurred in hiring ten workers by a firm is $45, and the total cost incurred when the eleventh worker is hired is $60, the marginal cost of hiring the eleventh worker is:

A) $20. B) $15. C) $105. D) $1.33.

The social interest theory of regulation is that

A) regulators help producers maximize economic profit. B) regulation seeks to increase the government's revenue. C) regulation causes producers to produce at a point where they are earning normal profits. D) regulation seeks an efficient use of resources. E) regulation focuses on the consumers' interests and ignores producers' interests.