Jenya answered 24 out of 30 questions correctly on her math test and 21 out of 25 questions correctly on her science test. On which test did she score higher?

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?