12. Making Connections According to Hamilton's economic plan, how
would paying the states debts from the American Revolution help to
strengthen the federal government at home and abroad?

Hamilton wanted to expand the U.S. economy and increase the nation’s wealth by using the federal government to promote business, manufacturing, trade, land grants (for education), and infrastructure(e.g. roads, canals). He presented Congress his plan to pay off all war debts as quickly as possible so that the government would not lose respect “at home and abroad”, meaning that that he wanted to establish the U.S.'s credibility in the eyes of other nations.

b europeans take corn to africa. corn becomes an important crop there.

i think i will need more detail to answer if this is a specific question on a test, but technology advancements are good for many industries, such as medicine or food industries, new technology could us in medicine in ways such as new scanners to tell us more about our bodies or new cures or vaccines for diseases.