A device delivers a constant power output of

MATHEMATICS · Subjective · AP · Calculus AB · Contextual Applications of Differentiation · Contextual Applications of Differentiation

Problem

480\text{ W}

. At the moment when the voltage across the device is

120\text{ V}

and is decreasing at

3\text{ V/s}

, determine the instantaneous rate of change of the current (include correct units).