R(a) = -0,68 + 800w- 3000 + 600, where x
P(x) = R(x) - C(x)
Then find
(800- 500)x^2 = 300x^2
(-300 - 400)x= -700x
-0.6x^3 dont change
600 dont change
Then answer is OPTION C)
-0.6X^3 + 300X^2 - 700X + 600
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