A popular model used to illustrate the concept of opportunity cost is called a. the production possibilities frontier.
Answer:
Ferguson ruled that separate-but-equal facilities were constitutional. The Plessy v. Ferguson decision upheld the principle of racial segregation over the next half-century. The ruling provided legal justification for segregation on trains and buses, and in public facilities such as hotels, theaters, and schools.
Explanation:
Cattle drives in the western United States largely ended in the late 1800s due primarily to a combination of barbed-wire fences and the new convenience of the railroad.
Answer:
Microwave ovens and space travel
Explanation:
<span>There was an embargo on trade between the United States and foreign nations. This embargo was the cause for 1812 - 1815 war between those countries </span>
