Section 2.5

Exercise: 80

Also:

1. 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?
2. Suppose $y = \sqrt{x}$ and $x = t^2 + 3$. Find $\left.\dfrac{dy}{dt}\right|_{t = 3}$.