Help a film student examines some of the major movies that were released in a particular year

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

Look at the chart showing the results of a baseball player at bat. which is the probability of getting a hit?

What is the distance between the points (2, 5) and (5,9)?