Find the coordinates of a if b(-9,-10) is the midpoint of ac and c has the coordinates of (-1,9)

The lines marked by the letters a, b, and c on the map above represent a. chains of volcanoes b. earthquake fault lines c. thin strips of heavy forests d. major rivers that flow from north to south

If scientists only detect p waves in a certain layer of earths interior what does that tell us?

The caste system in india was used for what purpose? a) to ensure that all people had an adequate income b) to prevent the rich from taking too much power c) to provide social control and conformity according to one’s birth d) to draft a military capable of defending india from mongol invasion