3. The volume, v cubic metres, of water in a reservoir varies with time t, in...

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3. The volume, v cubic metres, of water in a reservoir varies with time t, in minutes. When a valve is opened the relationship between v and t is given by: v = 3*104-16t2-8t3. Calculate the rate of change of water volume at the time when t= 2.5 minutes. (* means multiply) 3. The volume, v cubic metres, of water in a reservoir varies with time t, in minutes. When a valve is opened the relationship between v and t is given by: v = 3*104-16t2-8t3. Calculate the rate of change of water volume at the time when t= 2.5 minutes. (* means multiply)