In Sudan all people live along which river ?

Eastern europe and parts of northern europe have which of the following climates?

Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite

Find a formal factor that connects egypt to africa to europe and to southwest asia