significant figures

Question

The number of significant figures in 0.00340 is:

RankGuru · Accepted Answer

**Rules for Significant Figures**:
1. **Leading Zeros**: Zeros to the left of the first non-zero digit are *not* significant. ($0.00$ are not significant).
2. **Non-zero digits**: Are always significant ($3$ and $4$ are significant).
3. **Trailing Zeros**: Zeros to the right of the decimal point *and* after a non-zero digit are significant ($0$ at the end is significant).
- **Conclusion**: The digits **$3, 4,$ and the trailing $0$** are significant. Total = **3**.

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More significant figures Practice Questions

What is the result of (2.5 × 3.42) / 1.2 when expressed with correct significant figures?