Explanation
Significant figures are the digits of a number that are meaningful in terms of accuracy or precision.Also, digits of a number are not significant when they do not add information regarding the precision of that number, so for example.
[tex]\begin{gathered} \\ 075,000 \end{gathered}[/tex]the leading and trailing zeros do not affect preccion, so it has 2 S.f. (75)
A)The quantity 0.006382m
it has 4 S.f (6382)
B)The quantity 0.6382m
it has 4 s.f (6382)
C)The quantity 6.38200×104 m
it has 6 s.f ( 638200)
D)The quantity 63802m
it has 5 s.f (63802)
I hope this helps you