2 significant figures.
1 significant figure.
There are two of them.
It is 9680
8.30 x 10^4
5.003 has 4 significant figures.
990 has three significant figures.
Those four numbers are all whole numbers.
231.57 has five significant figures/numbers. All the numbers in 231.57 are significant.
The numbers are 9, 10 and 11.
It then is 990
900 of them.
990, 000
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.