Simplify using order of operations five to the third power + 28 divided by 7 minus 1

Empty box + box + empty box fill in the box is equal to 30 how

Select the number of ways in which a line and a circle can intersect

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