200
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
0.00009893 to 1 significant figure = 0.0001
200
When rounding the number 213 to one significant figure, you look at the first digit, which is 2. The next digit is 1, which is less than 5, so you do not round up. Thus, 213 rounded to one significant figure is 200.
It's already there.
7000
2,000,000
9000
0.1
It is 0.01
10000000
0.9
12
800