Pour completer les expressions ci-dessous on peur utiliser au choix les nombres entiers

What is the volume of the sphere shown below with a radius of 3?

How to use order of operation in 20 divide by 4 multiply 5 = 1

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