No, it actually has seven significant figures.
Basic rule:
(1)When number has decimal point---count from left to right counting all numbers after the first non-zero number
ex.-->.009367 has 4 sig figs
ex.-->9.367 has 4 sig figs
ex.-->9.367000 has 7 sig figs
(2)When number doesn't have a decimal point---count right to left counting all numbers after the first non-zero number
ex.-->12 has 2 sig figs
ex.-->120 has 2 sig figs
ex.-->1207800 has 5 sig figs
223.4016 rounded five significant figures is 223.40
4 significant figures.
23,410 has four significant figures.
5 significant figures
45.0300mm has six significant figures. A significant figure is any non-zero digit or any embedded or trailing zero. Leading zeros are not significant.
101.01 has exactly five significant figures.
3.14159265358979 to five significant figures is 3.1416
Five significant figures.
Five significant figures.
It has five significant figures.
Five significant figures.
Five significant figures.
Five significant figures.
223.4016 rounded five significant figures is 223.40
4 significant figures.
1,200.1 has five significant figures.
23,410 has four significant figures.