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.
One significant figure.
6 significant figures.
1 significant figure.
1 significant figure.
1 significant figure.
The 1st four of them
It has 1 significant figure.
0.004 has 1 significant figure.
0.3 has one significant figure.
The last four are significant.
1 significant figure. It can also be written as 4x10^6 (one sig fig)
1 significant figure.
1 significant figure.
1 significant figure.
1 significant figure.
1 significant figure.
1 significant figure.