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Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

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?