5 significant figures.
4 of them.
5
One.
2
How many significant figures are in 20.8
There are 3 significant figures in '4.50g'
4 of them.
Three of them.
4
5
There are 4 significant figures in this problem.
4 of them.
3500
2
One.
10.1+25.01+5.08
five. 30.002