The English equivalent of the Portuguese phrase 'Cala boca sapa' is the following: Shut [your] mouth. The word-by-word translation is the following: 'cala' means 'shut'; 'boca' means 'mouth'. A less...
The mean distance is the same as the mean of a set of numbers,but this time, instead of them just being numbers, they're lengths. You just simply add up all the numbers and divide the total length,...