A UFO (Unidentified Flying Object) is moving in such a way that the vertical distance between the ground and the UFO is given by x(t) = t³ + 41², where x is measured in metres and t is measured seconds. Find the average velocity of the UFO in the first 3 seconds. Select one: O 21 m/s 41 m/s 3 O 41 m/s O 63 m/s

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