What is the angle of an square

Which of the following statements about the migration of workers to other countries is false?

Suppose you had to resolve the problems believed to be caused by distance decay in russia. what would you suggest?

Which of the layers of the earth has the following three characteristics? i. it is a solid outer layer. ii. it is between 3 and 30 miles thick. iii. it is separated into plates. a. the outer core b. the inner core c. the mantle d. the crust