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svetoff [14.1K]
3 years ago
12

60 POINTS

Mathematics
1 answer:
Maslowich3 years ago
6 0

Profit would be the revenue minus the cost

 so R=x^3-6x^2 +x +75 - C=x^2-70x =

see picture for answer


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35 :

t = 6.25 years

(about 6 years 3 months)

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36:

The two distances are the same (out and back), so set them equal.

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One rate is 460 and the other is 500.

460 x = 500 (4.8 -x)

460 x = 2400 - 500x

900 x = 2400

x = 2.5 hours for the slower plane.

4.8- x = 2.3 hours for the faster plane.

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