12
0.000892 to 1 significant figure is 0.0009 (1st significant figure is the first non-digit from the left, where in this case you can omit the number 2 since it will make no difference to the answer)
654 rounded to one significant figure becomes 700.
1534 to 1 significant figure is 2000.
10920 to 1 significant figure is 10000
12
It is 0.01
7000
0.9
0.1
10000000
9000
2,000,000
800
200
100
round to the first significant figure