he weekly earnings of students in one age group are normally distributed with a standard deviation of96dollars. A researcher wishes to estimate the mean weekly earnings of students in this age group. Find thesample size needed to assure with 95 percent confidence that the sample mean will not differ from thepopulation mean by more than5 dollars.

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

r = 78539458390583095803458309458039485093485 or just 3

step-by-step explanation:

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step-by-step explanation:

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