400
42.982
0.8531
6.5932
400
3.89 rounded to the nearest whole number = 4
390
0
0.0925
Well, darling, 389 rounded to the tens place is 390. See, we just bump that 9 up to the next tens digit because it's closer to 10 than it is to 0. Easy peasy lemon squeezy!
146,389 rounded to the nearest hundred thousand is 100,000.
400
to solve 389 minutes into seconds you would multiply the minutes by how many seconds are in a minute 389x60=23340 seconds. and to solve 389 minutes into hours, you would divide the minutes into how many minutes there are in an hour 389/60 = 6.483333333333333333333333333 rounded to 6.483 hours... the rest... uhh... someone else can figure it out