Many physical quantities are connected by inverse square laws, that is, by power functions of the form f(x) = kx-2, In particular, the illumination of an object by a light source is inversely proportional to the square of the distance from the source. Suppose that after dark you are in a room with just one lamp and you are trying to read a book. The light is too dim and so you move halfway to the lamp. How much brighter is the light? times as bright Need Help? Read It

In the United States and Canada, the approximate shoe size for men is given by the function S(L)=3L−24, where L is the approximate length of the shoe in inches. (1) Fill in the missing values in the inverse function that converts shoe size to shoe length. L=S/( ) + ( )     (2) What is the approximate length of a size 6 shoe? ( ) inches