<span>the national or federal debt consists of all the money borrowed over the years by the national government that is still outstanding. The national debt is the public and intragovernmental debt owed by the federal government. Two-thirds of the U.S. debt is the Treasury bills, notes and bonds owned by to the public. They include investors, the Federal Reserve, and foreign governments.</span>
Answer:
D. decreases initially and then is horizontal.
Explanation:
A horizontal long run average cost curve reflects increase in cost proportionate to output, so the firm's long run average cost curve will fall initially and then become horizontal.
Answer:
The correct answer is the opportunity cost of producing a good.
Explanation:
The production possibility curve or frontier shows all the different bundles of two goods that can be produced using the given resources.
The opportunity cost of a good is the amount of other good sacrificed to produce this one.
The slope of production possibility curve represents the opportunity cost of producing a good.