# The respective number of significant figures for the numbers 23.023, 0.0003 and 2.1 10–3 are

The respective number of significant figures for the numbers 23.023, 0.0003 and 2.1 $$\times$$ 10–3 are

1. ) 5, 1, 2
2. ) 5, 1, 5
3. ) 5, 5, 2
4. ) 4, 4, 2

2.1 $$\times$$10–3 has 2 significant figures.