=====Mathematics 140 - Fall 2012=====

====Homework====

**Section 2.5**

Exercise: 80

Also:

  - Suppose //V// is the volume of a cube with sides of length //x//, measured in inches. Suppose the cube is expanding so that at time //t// = 2, //x// is 20 inches and //x// is growing at rate of 3 inches per minute. At what rate is //V// increasing at that time?
  - Suppose $y = \sqrt{x}$ and $x = t^2 + 3$. Find $\left.\dfrac{dy}{dt}\right|_{t = 3}$.