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Rammstein53
1 month ago

a) correct

(b)

G(x) = -4000×2 + 36000x – 32000

Approach: G(x) = 0

-4000×2 + 36000x – 32000 = 0

-x2 + 9x – 8 = 0

Zero points at 1 (winning threshold) and 8 (winning limit)

(c)

Approach: G'(x) = 0

-8000x + 36000 = 0

x = 4.5

Since only whole x is possible, x=4 or x=5, because

G(4) = G(5) = 48000