Cole's cafe offers two kinds of espresso: single-shot and double-shot. yesterday afternoon, the cafe sold 16 single-shot espressos and 16 double-shot espressos. what percentage of the espressos sold were single-shot?

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