There should be 3.
It should have three.
2.6
There are four significant figures in 0.1111.
The number 30.4 has THREE significant figures.
It has 5 significant figures.
63.6615
192
It might have been possible to answer the question if the "following" multiplication had followed. But since you did not bother to make sure that it did, I cannot provide a more useful answer.
6 of them.
The answer depends on what operations were used. There should normally not be more significant figures in the answer than in any of the numbers used in the calculation.
No, three significant figures.
5 significant figures.
2 significant figures.
4 significant figures.
4 significant figures.
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
Two significant figures.