The degree to which quantity demanded changes after a price change is called? O elasticity of demand.
O a substitute good.
O a complementary good.
O consumer demand.

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?