Is exact numbers have infinite significant figures?Then how manySFdoes 5 have?
Yes. For ex., 2.54 has three significant figures. Velocity of light 299792458 m/s has 9 significant figures.
5 has 1 significant figure. But if you write 5.0 it has 2 significant figures. If you write 5.00 it has 3 significant figures
5 has 1 significant figure. But if you write 5.0 it has 2 significant figures. If you write 5.00 it has 3 significant figures