Chapter 10.2, Problem 8E

To determine

a)

The duration it take for $56\text{milligrams}$ of cobalt $55$ to decay into the amount of $28\text{milligrams}$.

To determine

(b)

The duration it take for $56\text{milligrams}$ of cobalt $55$ to decay into the amount of $14\text{milligrams}$

To determine

(c)

The duration it take for $56\text{milligrams}$ of cobalt $55$ to decay into the amount of $7\text{milligrams}$.