Refer to the information provided in Table 19.4 below to answer the question(s) that follow.Table 19.4Total IncomeTotal Taxes$10,000 $1,000 20,000 2,400 30,000 4,500 40,000 8,000Related to the Economics in Practice on page 393: Refer to Table 19.4. If income increases from $20,000 to $30,000, the marginal tax rate is

Sunshine's Organic Market sells organic produce. Assume that labor is the only input that varies for the firm. The store manager has determined that if she hires 12 workers, the store can sell 300 pounds of produce per day. If she hires 13 workers, the store can sell 370 pounds of produce per day. The store earns $4 for each pound of produce that it sells, and the manager pays each worker $80 per

day. Assuming no changes in either the daily wages paid to store workers or the price at which the store sells its produce, what is the minimum number of sales that would allow the firm to increase its profits by hiring a 14th worker? a. 374 pounds per day b. 380 pounds per day c. 390 pounds per day d. 450 pounds per day

The real rate of interest measures the ________ of capital investment.

A. marginal benefit B. value of the marginal product C. relative price D. opportunity cost