All of those figures are significant. If you want to round it to 2 sig figs, that would be 13.
To round 12.555 km to four significant figures, you would keep the first four non-zero digits, which are 12.56 km since the next digit (5) is greater than 5.
12.56 km
28.71
There are four significant figures in the number 0.6020.
4487 has four significant figures.
Four significant figures.
4 significant figures.
1124
28.71
2.002
93.70
There are four significant figures in 0.1111.
There are four significant figures in .007001
Four of them.
The number 3,072 has 4 significant figures.
100,3 has four significant figures.
Four significant figures.
It has four significant figures
0.00431209461 with four significant figures is 0.004312