An electrical device operates at a constant power of

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

Problem

60\text{ W}

, so current

I

(in A) and voltage

V

(in V) satisfy

IV=60

. If the current is

3\text{ A}

and decreasing at

0.20\text{ A/s}

, find the instantaneous rate of change of the voltage at that instant, giving appropriate units.