Please answer each of these questions to the best of your ability. You are welcome to re-watch parts of any of the videos to help you.

A rectangle has a constant height of 6 cm, as shown below. The area of the rectangle
is given by the formula , where is the length of the base of the rectangle and is the
height of the rectangle. In order to determine how fast its area is changing at the
instant that the base has length 8 cm, which of the following formulas would you
use?

A submarine is diving at a rate of 50 feet per minute. As the sub descends, the
water temperature outside is falling at a rate of 0.5 degrees per foot. Let
D be the depth of the submarine. Let T be the temperature outside the
submarine. How quickly is the temperature falling? If your answer is that
we need to know the depth and/or temperature, type NEI for not enough
information.

degrees per minute