Amanufacturer ia inspects a sample of 400 personal video players and finds that 398 of them have no defects. the manufacturer sent a shipment of 1600 video players to a distributor. predict the number of players in the shipment that are likely to have no defects.

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters