What is the effect on the graph of the function f(x) = 1/x when f(x) is replaced with f(x + 7) - 2?

A. shifted 2 units left and 7 units up
B. shifted 7 units right and 2 units up
C. shifted 7 units left and 2 units down
D. shifted 2 units right and 7 units down

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