Which of the following describes the transformation of the graph y = x2 in graphing y = -x2 - 5?
a. reflect over the x-axis and shift down 5b. reflect over the y-axis and shift down 5c. reflect over the x-axis and shift left

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