Acylindrical water tank is being filled with a hose. the depth of the water increases by 1 1/4 ft per hour. how many hours will it take for the water level in the tank to be 3 1/2 ft deep?

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?

What is the solution to the equation e3x=12? round your answer to the nearest hundredth

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?