The voltage V (volts), current I (amperes) and resistance R (ohms) of an electric circuit like the one shown here are related by the equation V = IR. Suppose that V is increasing at a rate of 5 volt/sec, while I is decreasing at the rate of 5 amp/sec. Lett denote time in seconds. Find the rate at which R is changing when V = 30 volts and I = 5 amp. dR dt ohms / sec