Thursday

July 31, 2014

July 31, 2014

Posted by **mat** on Friday, July 22, 2011 at 8:28pm.

- math -
**Reiny**, Friday, July 22, 2011 at 8:35pm(-1/x^2)dx/dt - (1/y^2)dy/dt = 0

when x=15

1/15 + 1/y = 1/9

1/y = 2/45

y = 45/2

(-1/225)(8) - (4/2025)(dy/dt) = 0

I will let you do the arithmetic

- math -
**Damon**, Friday, July 22, 2011 at 8:37pm-dx/x^2 - dy/y^2 = 0

so

dy/dt = - (y^2/x^2) dx/dt

when x = 15, find y

1/15 + 1/y = 1/9

1/y = 5/45 - 3/45 = 2/45

so y = 45/2

dy/dy = - (45^2/4/225)(8) = -18

**Related Questions**

calculus (related rates) - A particle moves in the plane along the curve y=xln(x...

MATH - IN A PHYSICS EXPERIMENT,THE DISTANCE OF X AND Y CM HAS A CONNECTION TO ...

Math Vocabulary - What does distance/ time/ rate of speed mean? It's all one ...

calculus: related rates - hello, please help me. A cylindrical can is being ...

college calculus - 1) each side of a square is increasing at a rate of 6cm/s. At...

chemistry - The rate law of the overall reaction. A + B -> C is rate = k[ A...

Math - Which of the following statements describe an exponential relationship? ...

math - a cube is expanding and its volume is increasing at the rate 96 cubic ...

science - How do I predict how long will it take for lava to reach the town, ...

calculus - The voltage V (volts), current I (amperes), and resistence R (ohms) ...