What is the major landform of northern africa

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

Select the word from the list that best fits the definition of branch of islam that is in iran

What type of aid does nigeria receive? short term, tied, voluntary, bilateral, multilateral or long-term?