D(t) = -4t^3 + 40t^2 + 500t = 4088
4t^3 - 40t^2 - 500t + 4088 = 0
t = 7
Therefore, the plane has flown 4088 km 7 hours after it took off.
Answer:
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Answer:
12
Step-by-step explanation:
ez claps pie
Answer:
The answer would be D, or 
Step-by-step explanation:
A is 540
B is 30
C is 720
D is 360