1. A box with a square base has a surface area including the top of 3 m^2. Express the volume V of the box as a function of the width w of the base.
2. A stone is thrown into a lake and t seconds later after the splash the diameter of the circle of the ripples is t meters.
a. Express the circumference C of this circle as a function of t.
b. Express the area A of this circle as a function of t.