3 of them.
Three
48.921 has five significant figures. A significant figure is any non-zero digit or any embedded or trailing zero. Leading zeros are not significant.
It has 1 significant figure.
0.004 has 1 significant figure.
Two significant figure
It has 1 significant figure.
48.921 has five significant figures. A significant figure is any non-zero digit or any embedded or trailing zero. Leading zeros are not significant.
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.
One significant figure
1 significant figure.
10 significant figures.