The answer is F because Barack Obama was the first black president of the United States
Direction as in North, South, East, West and help to provide a reference point to determine location.
If an important resource, such as oil, becomes unavailable, the production possibilities curve a. shift inwards.
"The production possibility frontier (PPF) is a curve on a graph that depicts the possible amount that can be produced or made of two products, if both are based upon the same limited resource for their creation. The Production Possibility Frontier is also termed as the production possibility curve. If it shifts inwards, it means the economy is shrinking due to a collapse in issuing resources and production capacity."
"The production possibility curve (PPC )is necessary because it helps in indicating the maximum possible production of items , in fixed resources. In macroeconomics, economists study and support a country or other organization's economic activity with its help."
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These are four ways it weaken the power of states
It gave the federal government the responsibility to protect individual rights.
2.It corrected mistakes in the 13th Amendment.
3.It allowed the president to impeach state leaders.
4.It removed governors from the legislative branch of the federal government.