The interest rate on Baa corporate bonds is ________, on average, than interest rates on Treasuries, and the spread between these rates became ________ in the 1970s

The United States has approximately

a. 80,000 businesses. b. 5.1 million businesses. c. 12.5 million businesses. d. 28.million businesses.

Normal profit is:

A. determined by subtracting implicit costs from total revenue. B. determined by subtracting explicit costs from total revenue. C. the return to the entrepreneur when economic profits are zero. D. the average profitability of an industry over the preceding 10 years.