Carbon-14 dating is used to determine the age of some unearthed bones.
(a) If the activity of bone A is higher than that of bone B, then bone A is (1) older than, (2) younger than, (3) the same age as bone B. Explain your reasoning.
(b) A sample of bone A is found to have 4.0 beta per gram of carbon, while bone B’s activity is only 1.0 beta for each gram of carbon. What is the age difference between the two bones?