Hello, anyone wanna talk? im super bored

News cameras take an overhead picture of a crowd at an outdoor event journalist then count the total number of people in the picture and use the sample of estimate the total number of people in the crowd this process is an example of

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

Given that s is the centroid of triangle mno, find sq.