The 1st four of them
It has 1 significant figure.
0.004 has 1 significant figure.
Two significant figure
It has 1 significant figure.
3 significant figures.
5. Integers ending in 0 are ambiguous because there is no way of establishing whether the number is accurate to the last digit (zero) or has been rounded to the nearest ten.
It has 1 significant figure.
0.004 has 1 significant figure.
1 significant figure. It can also be written as 4x10^6 (one sig fig)
Two significant figure
1 significant figure.
It has 1 significant figure.
3 significant figures.
3 significant figures.
1 significant figure.
One significant figure
1 significant figure.