Why does international trade require a system for exchanging currency

Which statement best describes a contribution of the works of nicolas copernicus and galileo galilei?

How w.e.b. dubois wanted to improve the social and economic situation that existed for african americans during the early 19th century?

Select the correct answer.which sentence about romans in the early roman republic is most likely to be true? use your knowledge of the origin of the roman republic to answer the question.a.they believed that kings could easily become cruel dictators.b.they disliked military generals for leading them into war. c.they were friendly to the people of the neighboring lands.d.they believed that men and women should have equal rights.