The RC circuit of Fig. 19-70 (same as Fig. 19-21a) has R = 8.7 k and C

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The RC circuit of Fig. 19-70 (same as Fig. 19-21a) has R = 8.7 kΩ and C = 3.0 μF. The capacitor is at voltage V0 at T = 0, when the switch is closed. How long does it take the capacitor to discharge to 0.25% of its initial voltage?

C: Vo
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