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Before watching the videos, think about and answer these questions to the best of your ability.

A right triangle has one leg of constant length 7 cm as shown in the diagram below.
The area of the triangle is given by the formula , where is the length of the base of
the triangle and is the height of the triangle. In order to determine how fast its is
area changing at the instant that the other leg has length 10 cm, which of the
following formulas would you use?

An airplane is climbing at a rate of 750 feet per minute. As the plane rises, the air
temperature outside is falling at a rate of 0.002 degrees per foot. Let A be the
altitude of the airplane Let T be the temperature outside the plane. How quickly is
the temperature falling per minute?

degrees/minute degrees/minute
degrees/minute degrees/minute degrees/minute degrees/minute You need
to know the current altitude of the plane and the current temperature to figure out
the answer.