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Ohm's Law states that across a resistor, the voltage of, resistance of, and current through the resistor are related
V = IR
where V is given in volts, I is given in amps, and R is in ohms. Assume at time t = 5 that I = .5A and R
at time t = 5, I is decreasing at a rate of .3Amp/s, and the resistance at any given time is governed by the equation
=
20N. If
R(t) = e-5t,
find the rate of change of the voltage.

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