Me ! add or subtract. give each answer in its simplest form. a)5/6+3/4= b) 3 3/8+5/12= c) 2 1/2+5 4/5 d) 6-6/7= e) 4 3/4-2/3= f) 6 1/3-2 3/5=

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