The significant figures are the first four non-zero digits - with the last of these adjusted if the following digit is 5 or more. [This is the crude school rule rather than the bias-free, IEEE approved rule.]
So the answer is 2231000.
2.002
There are four significant figures in .007001
It has four significant figures
100,3 has four significant figures.
Four significant figures.
1124
28.71
93.70
2.002
All of those figures are significant. If you want to round it to 2 sig figs, that would be 13.
There are four significant figures in 0.1111.
There are four significant figures in .007001
Four of them.
Four significant figures.
It has four significant figures
100,3 has four significant figures.
0.00431209461 with four significant figures is 0.004312