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  • 23-05-2023
  • Mathematics
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The height, h, in metres, of a weather balloon above the ground after seconds can be modelled by the function h(t) = -2t³ + 3r² + 149t + 410, for 0 ≤ t ≤ 10. When is the balloon's height 980 m above the ground? Use intervals/factors method to justify your answer.

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