There are 24 men and 36 women in a choir. a What percentage of the choir are men?
b What percentage are women?
C.10 more men and 10 more women join the choir. What are the percentages of men and women now?​

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