How many significant figures does 4.50e-3 have?
3 significant figures
The digits that count: 450
Why
- →Every non-zero digit is significant.
- →Trailing zeros after a decimal point record precision, so they are significant.
- →In scientific notation only the mantissa carries significant figures; the exponent places the decimal point.
4.50e-3 rounded
| Significant figures | Result |
|---|---|
| 1 | 5 |
| 2 | 4.5 |