How do we know the Vikings were in North America around 1,000 AD?

How do economists measure the success, or shortcomings, of the economy?

Which of the following was a key accomplishment of the people of songhai? a. they had a strong military and became the largest empire in west africa. b. they established a center of islamic scholarship. c. they worked with iron and prospered from the gold-salt trade. d. they dominated in the trade of ivory, enslaved people, and animal skins.

New zoya is a country of english-speaking people and has a very profitable economy. which of the following countries is most likely to be the closest to new zoya in terms of cultural distance? sulfura, which has a very profitable economy and where people speak sulfuran valyria, where people speak english and have a low standard of living danver, which has the same wealth and per capita income as new zoya novalandia, which is located close to new zoya and is easily accessible by road