Suppose that the number of cars manufactured at an automobile plant varies jointly as the number of workers and the time they work. if 220 workers can produce 198 cars in 5 hours, find the number of cars that 175 workers can produce in 6 hours.

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?

Tessa bought stock in a restaurant for $253.00. her stock is now worth $333.96. what is the percentage increase of the value of tessa's stock? a.) 81% b.) 32% c.) 24% d.) 76%

Asmall book publisher knows that 26 books weigh 41 lbs. how much do 40 books weigh?