Person 1 can do a certain job in 16 minutes, and person 2 can do the same job in 24 minutes. when completing the job together, which expression would be used to represent the amount of work done by person 1?

a. 16

b. 1/16

c. x/16

d. 16x

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?