At bruno’s video world, the regular price for a dvd is d dollars. how many dvds can be purchased for x dollars when the dvds are on sale at 20% off the regular price?

What are the domain and range of f(x)=[1/5]x

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

Which graph has a rate of change of zero