There are two significant figures.
84 lb = 38101.759 g
84 g = 0.084 kgTo convert from g to kg, divide by 1000.
5 sig figs
84 socks
there are 3 sig figs. 4, 0, and 5 are the sig figs
about 9
61 has 2 sig figs.
There are five sig figs
There are four sig figs in 2.905.
There are three sig figs in 1.05.
There are three sig figs in 4890.
All five of them are sig figs