Answer Happy

The unstable W+particle has a rest energy of 80.41GeV(1GeV=109eV) and an uncertainty in rest energy of 2.06GeV. Estimate the lifetime of the W+particle. A. 3.3×10−255 B. 4.3×10−255 C. 1.6×10−255 D. 1.6×10−245 E. 1.6×10−235