A 38 gram sample of a substance that's used to sterilize surgical instruments has a k-value of 0.113 N = Noe -kt No = initial mass (at time ‡= 0) N= mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time †= time, in days Find the substance's half-life, in days. Round your answer to the nearest tenth.