The weight of a usb flash drive is 30 grams and is normally distributed. periodically, quality control inspectors at dallas flash drives randomly select a sample of 17 usb flash drives. if the mean weight of the usb flash drives is too heavy or too light the machinery is shut down for adjustment; otherwise, the production process continues. the last sample showed a mean and standard deviation of 31.9 and 1.8 grams, respectively. using a = 0.10, the appropriate decision is

Which segments are congruent? o jn and ln o jn and nm o in and nk onk and nm

Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers.a) one of the 400 passengers is selected uniformly at random.let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =