What is the importance of the UKs relationship with the Commonwealth.

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

Alow pressure system is formed when an air mass cools over a cool surface and sinks. true or false

Which arrow is closest to laguna madra bay? a. 1 b. 2 c. 3 d. 4