-Based on the Graph, If 35% of the Original 40K

question 110

Multiple Choice

-Based on the graph, if 35% of the original 40K remains in a sample of basalt, what is the approximate age of the rock?

• A) 1 billion years old
• B) 2 billion years old
• C) 3 billion years old
• D) 4 billion years old
• E) 5 billion years old