Consider an open switch RC series circuit with R = 17,5 KΩ and C = 2,31 μF. If the capacitor is charged with a 24.0 V battery as in figure below, obtain the equation of the charge growth in the capacitor as a function of time. if the capacitor is at a voltage 18.0 V, when the switch is transferred from point a to point b, how, long does it take the capacitor to discharge to 90.0% of its original voltage?