Why do many Georgia rivers begin in the Blue Ridge province?

Why might have people followed the rivers to find their way into asia

Which of the following best describes brazil's economy from 1650-1880? a. it gradually shifted to manufacturing as the industrial revolution progressed. b. it was based on mining. c. it was based on plantation agriculture, where slaves served as a labor force. d. it was based on small, family-owned farms.

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4