Select all ratios that are in their simplest form.
A 4:23 B 11:17 C 30:23 D 18:26 E 26:13

What is the volume of this square pyramid?

Need on this geometry question. explain how you did it.

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