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Mathematics 10 Online
OpenStudy (anonymous):

help again

OpenStudy (anonymous):

@jigglypuff314

OpenStudy (anonymous):

Ooh calculus my favorite

OpenStudy (anonymous):

So what's the formula for the SA of a cube?

OpenStudy (anonymous):

And what's Ds/dt

jigglypuff314 (jigglypuff314):

Surface Area of Cube = 6 s^2

OpenStudy (anonymous):

I was asking the guy who needed help because ya know...

OpenStudy (anonymous):

Anyways, ds/dt is 4m/ps

OpenStudy (anonymous):

So derive the formula 6s^2

OpenStudy (anonymous):

with respect to t

OpenStudy (anonymous):

im so confused

OpenStudy (misty1212):

HI!!

OpenStudy (anonymous):

hi

OpenStudy (anonymous):

So do you know how to derive?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

Derive 6s^2

OpenStudy (misty1212):

you get that the surface area of a cube with side say "\(x\)" is \[S(x)=6x^2\] right ?

OpenStudy (misty1212):

so \[S'=12 x x'\] by the chain rule you are told \(x=12,x'=4\) plug in the numbers that is all

OpenStudy (anonymous):

so it would be 48 ?

OpenStudy (misty1212):

lol no

OpenStudy (anonymous):

no...

OpenStudy (misty1212):

multiply!!

OpenStudy (anonymous):

192?

OpenStudy (anonymous):

No let's plug it in 1 by 1... So you have 12(12(x') so then you plug in that which is 4 So it becomes 12(12)(4)

OpenStudy (anonymous):

576

OpenStudy (anonymous):

@alisyed5865 can you help me with another question and also thank you @misty1212 and @@alisyed5865 for the help

OpenStudy (anonymous):

yEAH SURE

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