The word 'safeguard' has a few uses: 1: make safe; 2: a document or escort providing safe passage through a region especially in time of war; 3: a precautionary measure warding off impending danger or damage or injury etc.; 4: escort safely
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,...