*Date:* MATH 1210-4 - Spring 2004

*Note:* Unless stated otherwise, answers without justification
receive *no credit*. Please, *show your work!*

- Use differentials to approximate .
- An airplane, flying horizontally, at an altitude of 1 mile,
passes directly over an observer. If the constant speed of the
airplane is 600 miles per hour, how fast is its distance from the
observer increasing 1 minute later?

Javier Fernandez 2004-03-09