12. If a regular polygon has n sides, write a formula to calculate the measure of each interior angle.
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Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers.a) one of the 400 passengers is selected uniformly at random.let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem

Given abcd ac=38 and ae=3x+4 find the value of x

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?