How many states had to ratify the constitution in order for it to go into effect?

Who founded the social contract theory of the government

All of the following were weaknesses of the articles of confederation, except: a) the central government was not permitted to regulate state, interstate, or foreign trade. b) the central government was not permitted to borrow money. c) the central government had little ability to regulate money. d) the central government had no ability to tax.

What industry did chavez nationalize that caused rampant inflation?