An electron moving with speed 3.99 x 106 m/s enters an electric field at a point A where the electric potential is 2.45 V, and leaves the field at a point B where the electric potential is 1.32 V. Determine the amount (in J) by which the kinetic energy of the electron changed in moving from Point A to Point B? Enter a positive number if the kinetic energy increased, and a negative number if the kinetic energy decreased. Take the mass of an electron to be 9.11 x 10-31 kg and the Coulomb's law constant to be k=9.00 x 109 NC-2m2. Also, please enter your answer using scientific notation that is correct to exactly 3 significant figures