Wednesday

October 1, 2014

October 1, 2014

Posted by **anna** on Wednesday, November 17, 2010 at 7:35pm.

- math cal -
**Reiny**, Wednesday, November 17, 2010 at 8:56pmDid you make a sketch and got a right-angled triangle?

let the horizontal distance between the plane and the station be x miles

let the distance between the plane and the station be y miles

given: dx/dt = 480 mph

find: dy/dt when y = 6

y^2 = x^2 + 3^2

when y = 6

36 = x^2 + 9

x = √27

2y dy/dt = 2x dx/dt

dy/dt = (x/y)dx/dt

= √27(480)/6

= 415.7 mph or 416 mph

**Answer this Question**

**Related Questions**

Cal - A plane flying horizontally at an altitude of 3 mi and a speed of 480 mi/h...

calculus - a plane flying horizontally at an altitude of 2 mi and a speed of 460...

CALCULUS - A plane, flying horizontally at an altitude of 1 km and a speed of ...

Calc - A plane flying horizontally at an altitude of 1 mi and a speed of 510 mi/...

calculus - A plane flying horizontally at an altitude of 1 mi and a speed of 560...

Calc - How do I do this related rates problem? A plane flying horizontally at an...

calculus - A plane flying horizontally at an altitude of 1 mi and a speed of 500...

calculus - A plane that is flying horizontally at an altitude of 6 kilometers ...

Calc - A plane that is flying horizontally at an altitude of 6 kilometers and a ...

PRECALCULUS - An airplane is flying at a speed of 250 mph at an altitude of 4 ...