-
There are 4 significant figures.
-
There are 3 significant figures.
-
There are 3 significant figures - in this case the zero after the decimal
counts.
-
There are certainly 2 significant figures (25). The two zeros would most likely not
be considered significant.
-
There are 2 significant figures (70)
-
4 significant figures.
-
2 significant figures (67)
-
3 significant figures (602 are significant figures - the power on the ten
doesn't count)