First find the derivative of f(x):-
f'(x) = 3x^2 - 12x + 8
So instantaneous rate at x = 3
= 3(3)^2 - 12(3) + 8
= 27 - 36 + 8 = -1 answer
Answer:
x is the retail price
b/x 35/100 and cross multiply?
or 100b/35x
(this is the only thing i can think of)
Step-by-step explanation: