Answer:
D (right-down graph)
Step-by-step explanation:
y = ax+b - linear function,
a>0 - ascending
a<0 - descending
- ascending function, because , so a>0
- descending function, cause , so a<0
We refuse both graphs on the left side, these are two ascending functions
is the area above the ascending function
is the area below the descending function
This causes that D (right-down graph) is a correct answer
C(t)+ 30t/200+t
(b) what happens to the concentration as t--> infinity?
Answer:
i think u should first givr her discount by doing 20/100×3500=700 and than he will get 5 percent profit than here
3500-700=2800
now for 5 % profit
5/100*2800=140
hence
20% discount=700
5% profit =140
it might be wrong but here u go