Some properties of significant figures to keep in mind are:
1. all none zero numbers count (1-9)
2. all trailing zeros don't count (1000)
3. all leading zeros don't count (0.005)
4. all zeros between nonzero numbers count (1001)
5. all zeros after a decimal (not leading) count ($1.00)
Thus, since this number has leading zeros, we will not count them So then this number rounded to 2 significant figures will be: 0.055