Aspinner has equal sectors labeled 1-5. what is the probability of spinning an even number followed by another even number and are these events dependent or independent? a) 4/25, dependent b) 4/25, independent c) 4/5, dependent d) 4/5, independent

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