Question

Precalculus question....

Answer 1

(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)

Answer 2

Can I have a little bit of more hint to find out the first part, I am not getting it.

Answer 3

take the derivative of the equation and put equal to 0 and hence find factors of it..

Answer 4

you need to solve a cubic equation which can be a bit painful

Answer 5

oh - do you know any calculus? differentiation?

Answer 6

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

Answer 7

r u there??

Answer 8

- no ur not thats nubeer of course!!