Question

The number of significant figures in $50000.020\times {10}^{-3}$ is _______.

Answer 1

Explanation,

1. All the digits that contain non-zero are significant.
2. The zeros that are written before non-zero digits are not significant.
3. While calculating significant figures we need to start from the first non-zero digit and then end at the last non-zero digit.
4. All zeroes between two non-zero digits are significant.
5. The rightmost zeros are significant when there is a decimal point in the number.
6. So here $50000.020$ are significant figures.
7. So the answer is 8.

Hence, $50000.020\times {10}^{-3}$ have 8 significant figures.