The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
231.57 has five significant figures/numbers. All the numbers in 231.57 are significant.
The mean of a set of numbers is found by adding them together and dividing by how many numbers were added.
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.
Because 10.00400 is 10.004, this has five significant digits (numbers).
3 significant figures.
It has five significant figures.
7 significant figures.
3 significant figures.
There are 5 significant figures.
Two significant figures.
Four significant figures.