3 significant figures.
231.57 has five significant figures/numbers. All the numbers in 231.57 are significant.
The figure 18.03 has a total of four significant numbers
Three. All nonzero numbers are significant, and any zeros in between significant numbers are significant.
The question itself is wrong why is the .0157 not named as 1.57 if a number is higher than a 100 its is called at 1.00 but which is greater? its the .0157
Because 10.00400 is 10.004, this has five significant digits (numbers).
There are 5 significant figures.
It has 4 significant figures
Four significant figures.
Three significant figures.
5 significant figures.
Four significant figures.
1 significant figure.