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OpenStudy (anonymous):
Precalculus question....
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OpenStudy (anonymous):
OpenStudy (anonymous):
(a) you have to take the derivative of c(t) , equate to 0 and then find critical points out of those critical points you have to find the one that maximizes c(t)
OpenStudy (anonymous):
Can I have a little bit of more hint to find out the first part, I am not getting it.
OpenStudy (nubeer):
take the derivative of the equation and put equal to 0 and hence find factors of it..
OpenStudy (cwrw238):
you need to solve a cubic equation which can be a bit painful
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OpenStudy (cwrw238):
oh - do you know any calculus? differentiation?
OpenStudy (cwrw238):
this link gives you the graph http://www.wolframalpha.com/input/?i=solve++++-0.002t%5E4+%2B+0.039t%5E3+-+0.285t%5E2+%2B+0.766t+%2B+0.05+%3D+0
OpenStudy (cwrw238):
r u there??
OpenStudy (cwrw238):
- no ur not thats nubeer of course!!
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