round to the first significant figure
200
It is then 30,000 rounded to 1 significant figure
Rounded to 1 significant figure it is 0.4
0.00009893 to 1 significant figure = 0.0001
Round 12 to 1 significant figure is 10.
7000
0.9
0.1
10000000
9000
2,000,000
12
800
200
100
round to the first significant figure