Suppose the following data set represents the starting salaries for the population of teachers from nine states: (10 points) $31,184 $43,839 $35,358 $31,606 $33,549 $39,196 $35,541 $34,972 $39,674 Part A: Calculate the mean of the data set. (3 points) Part B: Calculate the five-number summary. (3 points) Part C: Calculate the standard deviation of this data set.

0.02040816326

geometry: triangles

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call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3