Tell me ur zodic and i tell u 3 fun facts about it

What part did glaciers play in forming the great lakes?

Witch one is it soo it the the question b.a,b,c,d

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