Write down a proportionality equation which that can be used in finding the area (calligraphic “A”) of a circular sector that corresponds to an angle (theta) expressed in radians.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. find the probability that a randomly selected bill will have an amount greater than $173, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?