The number .007 contains one significant figure.
One and it is 7
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
4
five!!
3 of them.
4 significant figures.
Two significant figures.
There are 5 significant figures in this number.
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
None.None.None.None.
4
five!!
4 of them.
6 of them.
3 of them.
5 significant figures.
2 significant figures.
4 significant figures.