Question

A 12 foot ladder is leaning against a wall. If the top slips down the wall at a rate of 2 ft/s, how fast will the foot be moving away from the wall when the top is 11 feet above the ground?

The foot will be moving at__________ft/s.

Answer 1

3.33 ft/s

Answer 2

thanks

Answer 3

any time

Answer 4

wait i got it wrong,

Answer 5

what ?

Answer 6

can you give me some more decimals?

Answer 7

look the rational expression is \[\frac{ 20 }{ \sqrt{44} }\]

Answer 8

im still getting it wrong :(

Answer 9

but excuse me i plugged h for 10 instead of 11
sorry !!

Answer 10

just a sec

Answer 11

4.5929

Answer 12

im still getting it wrong for some reason, i just cant figure it out

Answer 13

whaaaaa ??
do you know how to solve it ??

Answer 14

like I got the same thing you did

Answer 15

beware of answer with no splanation

Answer 16

look

Answer 17

\[x^2+y^2=12^2\\
2xx'+2yy'=0\\
x'=-\frac{y}{x}y'\]

Answer 18

plug in the numbers now

Answer 19

im getting 4.5929

Answer 20

by applying the Pythagorean equation we get : \[12^2 = h^2 + w^2\]
and when we simplify it to get : \[w=\sqrt{144 - h^2}\] we then differentiate it and plug in the numbers

Answer 21

@satellite73 i did explained the answer, if you look up you will see a picture of the problem we have