Sunday

April 20, 2014

April 20, 2014

Posted by **Lost student** on Saturday, March 12, 2011 at 12:20am.

- Calculus -
**drwls**, Saturday, March 12, 2011 at 2:08amLet the distance of the bottom of the ladder from the wall be x, and let the distance of the top of the ladder from the floor be y.

x^2 + y^2 = 256

You want to know dy/dt when dx/dt = 3 and x = 2. At that time, y^2 = 252 and y = 15.87

2x *dx/dt + 2y*dy/dt = 0

dy/dt = -(x/y)*dx/dt = -0.126 dx/dt

Use that equation to calculate dy/dt

**Related Questions**

Calculus II - A 24 foot ladder is leaning against a building. Let x be the ...

Calculus - The top of a 24 foot ladder, leaning against a vertical wall, is ...

Calculus - 1a. 15 ft ladder is placed against a vertical wall. the bottom of the...

Algebra - I need to find the slope of a ladder that is leaning against a ...

Calculus - A 17 foot ladder is leaning against a wall. The bottom of the ladder...

Calculus - A 20' ladder leans against a building. The bottom of the ladder is ...

Calculus - A 15 ft ladder is placed against a vertical wall. the bottom of the ...

Calculus - related rates: a ladder, 12 feet long, is leaning against a wall. if ...

math word problems - A ladder is leaning against a building. The distance from ...

CALCULUS HELP!! - I haven't done this type of problem in a while, so if someone ...