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Find the required measurements of the following trapezoids. a = 8 cm b = 16 cm h = 10 cm

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

What are the coordinates of the midpoint of ab? ,1/2) /2,-1) ,-3/2) /2,-2)