It is 0.01
round to the first significant figure
It is then 30,000 rounded to 1 significant figure
Rounded to 1 significant figure it is 0.4
1512 to 1 significant figure is 2000
200
Round 12 to 1 significant figure is 10.
It is 0.01
7000
0.9
0.1
10000000
9000
2,000,000
12
800
100