Atin man has a head that is a cylinder with a cone on top. the height of the cylinder is 12 inches and the slant height of the cone is 6 inches. the radius of both the cylinder and the cone is 4 inches. what is the surface area of the tin man's head in terms of pi?
a) 136π in2
b) 152π in2
c) 168π in2
d) 172π in2

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