Posted by **Anna** on Sunday, November 4, 2012 at 6:00pm.

At a given moment, a plane passes directly above a radar station at an altitude of 7 miles.

(a) If the plane's speed is 400 mph, how fast is the distance between the plane and the station changing half an hour later?

(b) How fast is the distance between the plane and the station changing when the plane passes directly above the station?

## Answer this Question

## Related Questions

- PRECALCULUS - An airplane is flying at a speed of 250 mph at an altitude of 4 ...
- Pre-Calc - An airplane is flying at a speed of 250 mph at an altitude of 4 miles...
- pre cal - An airplane is flying at a speed of 350 mi/h at an altitude of one ...
- calculus - A plane that is flying horizontally at an altitude of 6 kilometers ...
- calculus - shortly after taking off, a plane is climbing at an angle of 30° and ...
- Calc - A plane that is flying horizontally at an altitude of 6 kilometers and a ...
- Math - An airplane is flying at an altitude of 6 miles and passes directly over ...
- calculus - a plane flying horizontally at an altitude of 2 mi and a speed of 460...
- Calculus - A train is heading due west from St. Louis. At noon, a plane flying ...
- calculus - A plane flying horizontally at an altitude of 1 mi and a speed of 500...

More Related Questions