As a result of increasing its workforce from 9 workers to 10 workers, a firm's total revenue per day increases from $60,000 to $60,250 and its total cost per day increases from $58,500 to $58,700 . The marginal profit of the 10th worker is

In a competitive industry buffeted by demand supply shocks, prices increase and decrease, but economic profits tend to revert to zero. Hence, profits are exhibiting

a. Above-average return b. Positive earnings c. Mean reversion d. None of the above

People under the age of 25 are less likely to be poor than those older than 25

Indicate whether the statement is true or false