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.
Part A: What is the capacitance of this capacitor? (The dielectric constant of Teflon is 2.1.) Express your answer using two significant figures.