841 ÷ 22, no quiero solo la respuesta, si no que quiero la división escrita como una cuenta

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

In the diagram of circle o, what is the measure of zabc?

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2