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Two 3.3 μF capacitors, two 2.2 kΩ resistors, and a 12.4 V source are connected in...

Two 3.3 μF capacitors, two 2.2 kΩ resistors, and a 12.4 V source are connected in series.

Starting from the uncharged state, how long does it take for the current to drop from its initial value to 1.16 mA ?

Express your answer using two significant figures.

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