Two conducting spherical shells are concentric, with radii of 0.30 m and 1.70 m. The electric potential of the inner shell, with respect to the outer shell, is +730 V. The electric potential at a point between the shells is +480 V with respect to the outer shell. An electron is projected radially outward from this point with an initial kinetic energy of 200 eV. The kinetic energy of the electron as it reaches either shell is closest to: