201.87 rounds to 202. it would not be 201 because you have to use the 8 as your rounding digit. 8 rounds up so it become 202.
0.0034088 in three significant figures would be 0.00341
130
31,500
201
It is: 1040
21.3
0.990
0.00241
The number 10.989 rounded to 3 significant figures is 11.0
79,900
It's already there.
6.71 is 6.7050 is rounded to three significant figures.