A group of winning ticket holders share. equally in a $60,000,000 lottery. Before the money is divided, two more winning ticket holders are declared. As a result, each person's share is reduced by $2,500,000. How many people were in the original group of winners?
There were
people in the original group of winners.

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