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