Title: Related Rates PreVideo Questions
Course: Calculus Videos Project Modules

Q: A square's side length, [Image: equation], is increasing at a rate of 3 inches per second, as shown below. How quickly is its area increasing?
[Image: image]
- [Image: equation] (Incorrect)
- [Image: equation] [Image: equation] (Correct)
- [Image: equation] [Image: equation] (Incorrect)
- [Image: equation] [Image: equation] (Incorrect)
- [Image: equation] [Image: equation] (Incorrect)
- [Image: equation] [Image: equation] (Incorrect)
A: [Image: equation] [Image: equation]

Q: 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 [Image: equation] be the altitude of the airplane Let [Image: equation] be the temperature outside the plane. How quickly is the temperature falling per minute?
- 0.002 + 750 degrees/minute (Incorrect)
- 0.002 * 750 degrees/minute (Incorrect)
- [Image: equation] degrees/minute (Incorrect)
- [Image: equation] degrees/minute (Incorrect)
- 0.002 - 750 degrees/minute (Incorrect)
- 750 - 0.002 degrees/minute (Incorrect)
- You need to know the current altitude of the plane and the current temperature (Correct)
A: You need to know the current altitude of the plane and the current temperature

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