What is the mean most useful in describing a set of data

The expression 6x2 gives the surface area of a cube, and the expression x3 gives the volume of a cube, where x is the length of one side of the cube. find the surface area and the volume of a cube with a side length of 6m

Which strategy is used by public health to reduce the incidence of food poisoning?

Factor and solve to find roots x squared -x - 90 =0