Three of them and they are 445
there are 3 sig figs. 4, 0, and 5 are the sig figs
5 sig figs
There are four sig figs in 1.032
There are four sig figs in 2.905.
There are 4 sig figs in 20.13
There are four sig figs in 60.55.
There are eight sig figs in 57.115102.
61 has 2 sig figs.
There are three sig figs in 4890.
There are three sig figs in 1.05.
There are five sig figs
All five of them are sig figs