1
2 significant figures.
5 significant figures.
There are 4 significant figures in 9.000.
4 significant figures.
there are 2 significant figures
there are 2 significant figures in 21000 2 & 1 are the significant figures.
There are 4 significant figures in 0.0032. Seems to be only 2 significant figures in this number.
It has 1 significant figure.
4 significant figures.
0.007001 has four significant figures. The leading zeroes are not significant. The zeroes between the 7 and 1 are significant because they are between two significant figures (7 and 1).
2.31 has 3 significant figures 4 has 1 significant figure 8.123 has 4 significant figures
5 significant figures.