Four.
2000
6 significant figures.
1 significant figure.
One significant figure.
1 significant figure.
4 significant figures.
2000 has one significant figure. A significant figure is any non-zero digit or any embedded or trailing zero. Leading zeros are not significant.
1512 to 1 significant figure is 2000
2000
2000
2000*60=120 000 as 2000 is taken to have only one significant figure, we have a result of 100 000
It is 2000.
2000
It has 1 significant figure.
0.004 has 1 significant figure.
2000
1 significant figure. It can also be written as 4x10^6 (one sig fig)