A regular triangular pyramid has a base area of 31.5 mm2
and a surface area of
252 mm2. What is the lateral area of the regular triangular
pyramid?
OA) 220.5 mm2
OB) 126 mm2
OC) 283.5 mm2
OD)127.75

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