Question

HELP:https://snipboard.io/5fpjDu.jpg

Answer 1

Its fr the question I am asking

Answer 2

ok all good

Answer 3

Do you know what domain and range are @kekeman

Answer 4

Yes this is what I have came up with

Answer 5

https://snipboard.io/zHqeaQ.jpg

Answer 6

\[c(t)=\frac{ -8t^2+56t }{ t^2+3t+2 }=\frac{ -8t(t-7) }{ t^2+t+2t+2 }=\frac{ -8t(t-7)}{t(t+1)+2(t+1) }\]
\[=\frac{ -8t(t-7) }{ (t+1)(t+2)}\]
it is not defined for t=-1 and t=-2
c(t)=0,if t=0,7
Domain is 0<t<7
\[\ \because ~c(t)>0~if~t \in(0,7)\]

Answer 7

doctors want to have some concentration of medicine.
so \[t \ne0,t\ne 7\]
so domain is (0,7)

Answer 8

Okay thank you