Exhibit 19-2 the Following Question(s) Pertain to a 450 Gram Sample of Sample

Exhibit 19-2
The following question(s) pertain to a 450 gram sample of ⁶⁰Co recovered from a decommissioned nuclear reactor. An activity of 1.11×10¹³ Bq was measured by technicians dismantling the plant.
Refer to Exhibit 19-2. What is the half life of the ⁶⁰Co?

A) 1.43 years
B) 2.17 years
C) 4.51 years
D) 5.26 years