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        • The final answer is:
          Determine the average velocity of the ball
          During the first 5 seconds.
          Average rate of change= f(b)- f(a)/ b- a
          Average velocity
          Vave= h(5)-h(0)/5-0
          [40(5)-5(5)2] – [40(0)-5(0)2]/5
          = 200- 125/5
          =75/5
          =15m.s-1

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