Teresa has 2/5 of a pan of cornbread her family eats 1/2 of the corn bread that he has teresa says that her family is a 4/5 of a pan of cornbread is teresa correct?

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?