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Learning Goal S3 13. The function V(t) = 0.027+3 - 0.27t2 + 0.675t, where V is the volume in litres, and t is the time

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Learning Goal S3 13. The function V(t) = 0.027+3 - 0.27t2 + 0.675t, where V is the volume in litres, and t is the time in seconds, represents the volume of air in a person's lungs during a normal 5 second respiratory cycle. a) Determine the intervals of concavity. b) What do they represent for this situation

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