determinati coordonatele geografice ale stramtorii bab-el-mandeb, aplicand reteaua de grade a hartii. Va ro dau coroan

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

Most countries in the middle east must import a majority of their a. gasoline b. oil c. food d. water

The meseta in spain is a a. navigable river b. castle c. coastal plain d.plateau