math question

Question

southern state has seven state universities in its system. The numbers of volumes (in thousands) held in its libraries are 83, 510, 33, 256, 401, 47, and 23.a. Is this a sample or a population? b. Compute the standard deviation.

Answer 1

math question a bird leaves a nest, N, and flies 800m on a bearing of 132 to a tree, T, it then leaves T and flies 650m on a bearing of 209 to a pylon P. Assuming that N,T and P are in the same height above the ground, calculate the distance and bearing on which the bird must fly in order to return directly from P to N

Answer 2

aworm is crawling along the edges of a wooden box which meaures 2cm high, 3cm wide and 1cm long. the worm's goal is to take the longest  route possible from point A finally back to point A again, no edge can be crawled on more than once. how many centemeters does the wormtravel during the course of its journey?

Answer 3

when  a man traveled 3/4 of his journey, he notices that the distance covered by him is 12 km's .how much distance he has to cover? &  what will be the total distance he has  to travel ? I know the answer (if it is correct ) that, he has to cover    4 km's distance & the total journey will b 16 km's . how to represent mathematically?  Pl help