Help please ! thank u sm

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

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

Graph the function =gx+2x3 and give its domain and range using interval notation.