Q1a If the linear function of mx - y - m - 1 = 0 does not intersect with the circle function of x^2 + y^2 - 4x - 2y + 1 = 0, find the range values of m.

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