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LearningSkittles

There are 3 significant digits in 5.40.

(To help understand): Sig figs are just a way of simplifying a number. 

KIMMUS
Hey!
" 5.40 " have 3 significant figures

I'll explain it in an easy way.
The significant figures are "5" , "4" & "0" Since , zero comes after the decimal point. It can also be reported as a significant figure :)