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8. The height of the tip of an airplane propeller above the ground once the airplane reaches full speed can be modelled by a
8. The height of the tip of an airplane propeller above the ground once the airplane reaches full speed can be modelled by a sine function. At full speed, the propeller makes 200 revolutions per second. At t = 0, the tip of the propeller is at its minimum height above the ground. Determine whether the instantaneous rate of change in height at 1 t= is a negative value, a positive value, or zero. 300
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