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Please give the whole question

|dw:1352178476520:dw|

yep, well i already found dy/dt and i was deriving dA/dt but it seemed wrong

i got 1/2 db/dt * h + dh/dt *b

|dw:1352178791974:dw|

|dw:1352179052193:dw|

close, the answer is =59.5....

how did you do that? did you just took the derivative inside and distribute the half sign?

oops o missed something while differentiating the area formula

ok but did you do product rule?

yes

but wrong.. lol

|dw:1352179446697:dw|

do you have to distribute?

no theres nothing to distribute

then why do you have 0.5 multiplied on each portion? isn't 1/2 a constant?

just type that into your calc... and you should get it.

0.5 is a constant that could be factored out.. but there is no point

i did. but if i didn't distribute, i would get the wrong answer

oh no i got it/ lol nvm thanks!

:)