Acircular labyrinth has a circumference of 75 ft. what is the distance from the outside edge of the labyrinth to its center? use 3.14 for π. round your answer to the nearest foot.

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