What is this and what is it used for back in Ancient Rome time?

Which factor contributed to the rise of african empires such as ghana and mali?

How did shays' rebellion reveal the need for a revision of the articles of confederation? a) shays' rebellion exposed the weakness of the central government as written in the articles of confederation. b) shays' rebellion strengthened the ideas of the anti-federalists in the need for a strong national government. c) shays' rebellion illustrated the need for organized local government factions to handle situations such as this. d) shays' rebellion encouraged others to rebel and eventually led to the overthrow of the first established government in the united states.

The appalachian mountains rise to heights of about feet. 2,000 2,500 3,000 3,500