The production possibilities frontier is a graph that shows the various combinations of output that an economy

The law of diminishing returns states that as more workers are hired, beyond some point,

a. total output will fall b. total cost will fall c. marginal physical product will fall d. total cost will rise e. total output will rise

According to the equality-of-sacrifice doctrine, proportional income taxes impose a(n)

a. greater sacrifice on lower-income households. b. lesser sacrifice on lower-income households. c. greater sacrifice on higher-income households. d. equal sacrifice on all income levels.