The answer being 0.5456, the digit 2 can not be a good estimate since it is not close.
It is not close to 2 at all
0.004
.004
004 is the same as 4
Greater than
004 is the same as 4
987 multiplied by 004 is 3,948
0.04
.004
.004 kg is 4 grams
.004 + 3 + .03 = 3.034
No
4.00 is bigger than .004 which is the same as 0.004