Which is an equivalent expression written using Distributive property: 3 (m + 3)

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?

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