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Electrical Circuits The initial current and charge in an electrical circuit are zero. The current when 100 volts is applied to the circuit is given by
$$I=5 e^{-2 t} \sin t$$
where the resistance, inductance, and capacitance are 80 ohms, 20 henrys, and 0.01 farad, respectively.
Approximate the current (in amperes) $t=0.7$ second after the voltage is applied.