Jim and carla are scuba diving jim started out 10 feet below the surface he descended 18 feet rose 5 feet and descended 12 more feet then he rested carla started out at the surface she descended another 18 feet then she rested which person rested at a greater depth show your work and explain

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