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A parallel-plate capacitor is made from two aluminum-foil sheets, each 5.7 cm wide and 5.6 m long. Between the sheets is a Teflon strip of the same width and length that is 3.4×10^-2 mm thick. What is the capacitance of this capacitor? (The dielectric constant of Teflon is 2.1.) Express your answer using two significant figures.

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