Suppose we have to write 370 in the scientific way. Then we write the same as 3.7 x 102
Here we have dropped 0 as it is no more significant.
But if we do write as 3.70 x 102 then the place is to be there for an accuracy.
The value may vary as 3.73 x 102 with an accuracy.
If you mean when is it considered larger than it would be larger only then a negative number such as -1.
4.
4
The Rosetta was significant in 2004
5 of them.
Three of them.
It eats you mother(:
0.990
Six.
0.000005054 to 1 sig fig is 0.000005
There are 4 signifigant figures in 19.83
111.0