Fast calculus help

[thesurge]

A child 6 ft tall walks at a rate of 6 ft/sec toward a lightpole that is 22 ft above the ground. At what rate is the length of his shadow (x+y) changing when he is 36 ft (y) from the base of the light.

I got 9/4 ft./sec. Can anyone check?

edit:
steps
\frac{x+y}{22}=\frac{x}{6}
y=\frac{8}{3} \times x

d/dt(y)=d/dt(\frac{8}{3} \times x)

6=8/3 dx/dt
dx/dt=9/4

 

[AbsolutDealage]

This thread is now about Ranch Dressing. Discuss.

 

[Toastedlightly]

I'd show your steps. Easieir to see how you did it (any help if you did something wrong).

EDIT: Fuuking ranch. Ugh.

 

[Modular]

mmmm

Calcuranch

 

[thesurge]

edited op with steps. damn ranch.

 

[RapidSnail]

A six foot tall child?

 

[fitzov]

I prefer bleu cheese (or is that 'blue' cheese?).

 

[Cooler]

Originally posted by: RapidSnail
A six foot tall child?

In math facts do not have to be logical just the steps to solve for the answer.
If you want logical facts try an applied math.

 

[CraKaJaX]

Fast calc help? I Think you're looking in the wrong spot.

 

[chuckywang]

I get 9/4 ft/sec.

 

[VTHodge]

I have no idea how to read your steps.

 

[Epic Fail]

Unsolvable given we don't know the ingredients in the ranch or it's zero if the light isn't on.

 

[state 08]

Originally posted by: AbsolutDealage
This thread is now about Ranch Dressing. Discuss.

This has to be the fastest thread hi-jacking I've ever witnessed.


I like ranch on pizza!

 

[drinkmorejava]

I could do it, but I'm too lazy

 

[Toastedlightly]

PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPF

 

[thesurge]

Originally posted by: chuckywang
I get 9/4 ft/sec.

thanks.