OQ8. Safety regulations require that the time between airplane takeoffs (on the same runway) will be at least 3 minutes. When taking off, the run time of an airplane on the runway is 45 seconds. Planes wait, on average, 4 minutes and 15 seconds for takeoff. On average, there are 15 planes taking off per hour. How many planes are either on the runway or waiting to take off? 0Q9. In Children's Hospital in Seattle, there are, on average, 60 births per week. Mothers and babies stay, on average, two days before they leave the hospital. In Swedish Hospital (also in Seattle), the average number of births per week is 210 . Mothers and children stay in the hospital two days, on average. a. How many new mothers are staying in Children's Hospital? b. How many new mothers are staying in Swedish Hospital? c. The directors of the two hospitals are negotiating unifying the children wards of the two hospitals. They believe that by doing so they will be able to reduce the number of new mothers staying in the hospital. Are they correct? How many new mothers will stay, on average, in the unified ward? You may assume that the average number of births and the lengths of stay of the new mothers will not change