75 apartments on 15 floors = 35 apartments on ? floors

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 360, a standard deviation of 4, and a margin of error of 2.5%

If value of cos330° is √3/2 then find tan165°.