The countries shown on the map above are often studied together as a group for all of the following reasons except that a. they have a shared history b. they are isolated from the rest of africa by the sahara desert c. their cultures have more in common with europe than they do with the rest of africa d. they have a shared religion

Explain the value of statistics and other data to positive economics and to normative economics

1. crust 1 the metallic layer at the earth's center 2. inner core 3 the firm layer between the crust and the asthenosphere 3. lower mantle 2 the layer surrounding the inner core 4. asthenosphere 4 the semi-solid layer between the top layer and the upper mantle 5. upper mantle 5 the layer between the asthenosphere and lower mantle 6. top layer 6 the earth's outermost layer 7. outer core 7 the hottest part of the mantle

Find the area of the shaded region.