What is the Relationship between population distribution and urbanization

Which of the following describes what rocks usually are composed of ,

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

Find the slope of the line (6,4) and (3,2)