calculus

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The voltage V (volts), current I (amperes), and resistence R (ohms) of an electric circuit are related by the equation V=IR.

Suppose that V is increasing at a rate of 3 volt/sec while I is decreasing at a rate of 1/8 amp/sec. Let t denote time in seconds.

Determine the rate at which R is changing when V = 9 volts and I = 2 amperes.

Answer = _________ ohms/sec

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