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3 December, 20:50

A model rocket is launched from a raised platform at a speed of 144 feet per second. Its height in feet is given by h (t) = - 16t 2 + 144t + 20 (t = seconds after launch). After how many seconds does the object reach its maximum height? 20 seconds

6.5 seconds

2.25 seconds

4.5 seconds

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Answers (1)
  1. 4 December, 00:05
    0
    I think its 4.5 seconds
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