4 rows and 875 columns, or 875 rows and 4 columns
60/100 of a mile because if in three seconds it goes 3/100 it would mean 1/100 would be one second and one minute is 60 seconds so it would be 60/100 of a mile
The empirical rule says 68% of the distribution should fall within one standard deviation of the mean, so you should expect salaries between

and