If that's 3 x 10^4, it has one sig fig.
310 to the power of -4 = 306
6276 as a significant figure would be 4 significant figures.
It is: 4000 rounded to one significant figure
There are 4 significant figures in the given number.
4 of them.
4 of them.
2.31 has 3 significant figures 4 has 1 significant figure 8.123 has 4 significant figures
There are 4 (four) significant figures.
4 significant figures.
Four of them.
4 significant figures.
Only the 4.