What is the depth of pacific ocean (in km)?

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

What is a small water source like a stream or brook?

Which is not part of the definition of a family? two or more related people living together being married or in a partnership a single person living alone choices a and b