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2. The position function of a cyclist, starting from rest during a race, while moving is given by s = 220 - 0.5t, in metres,

2. The position function of a cyclist, starting from rest during a race, while moving is given by s = 220 - 0.5t, in metres, where t is measured in seconds. Find the average velocity over the time period t e [1.9,2] K/4

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