2.551799 has seven significant figures. A significant figure is any non-zero digit or any embedded or trailing zero. Leading zeros are not significant.
Three significant figures are in this number.
3 significant figures.
There are 4 significant figures in this number.
There are 4 significant figures in this number.
There are 3 significant figures in this number.
There are 2 significant figures in this number.
There are 3 significant figures in this number.
There are 3 significant figures in this number.
There are six significant figures in this number (i.e. all the figures here are significant).
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
There are 4 significant figures in this number.
There are 3 significant figures in this number.