The Total Energy of a Moving Electron Is $0.758 \mathrm { MeV }$

Multiple Choice

The total energy of a moving electron is $0.758 \mathrm { MeV }$ What is the speed of the electron in terms of c? The rest mass energy of an electron is 0.511 MeV.

A) 0.739 c
B) 0.794 c
C) 0.306 c
D) 0.933 c