Solve for x, rounding to the nearest hundredth e5x =20

Restrictions on f(x) = 1/x+5 and g(x) = x-2

What is not true about kl and mn? what is mn? (show )

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