The graph represents the distribution of the lengths of play times, in minutes, for songs played by a radio station over one hour. most of the songs were between 3 minutes and 3.8 minutes long. most of the songs were 3.4 minutes long. most of the songs were less than 3.2 minutes long. most of the songs were more than 3.6 minutes long.

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