True or false, Opportunity cost means how much you have to spend to do something.

According to this map, which of these statements is most correct? a) fewer people are contracting hiv in europe than in the past. b) fewer people are contracting hiv in southern africa than in the past. c) egyptians are less likely to contract hiv than people in sub-saharan africa. d) people in canada contract hiv more frequently than people in the united states.

What percentage of roads in germany have no speed limit?

Why do all market economies have taxes to support armed forces police forces public schools and at least some form of public transportation?