Half life of certain radioactive nuclei is 3 days and its activity is 8 times the safe limit. After how much time will the activity of the radioactive sample reach the safe limit ?

Explanation

To solve the problem step by step, we will use the concepts of half-life and the radioactive decay formula.

### Step-by-Step Solution:

1. **Understanding the Problem**:
- The half-life (T₁/₂) of the radioactive nuclei is given as 3 days.
- The initial activity (A₀) is 8 times the safe limit. We need to find the time (t) when the activity will reduce to the safe limit (A₀/8).

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