standard form and three significant figures?

[fly.like.a.bird]

okay, I wanna check if this is right:

1.709 to 3sig.fig. = 1.71
0.03822 to3sig.fig = 0.04
1365001 to 3sig.fig. = 1370000


to 3sigfig & standard form???!!! =/

5855 = 5.86 x10 ^3
1210377 = 1.21 x10 ^6
0.00047255 = 4.73 x10 ^-4
0.1156 = 1.16 x10 ^-1

????????????? HELP!!!! =(