Situation: a 25 gram sample of a substance thats used for to sterilize surgircal instruments has a k-value of 0.1205. n=noe^-kt no=initial mass( at time t=0) n=mass at time t k=a positive constant that depends on the substance itself and on the units used to measure time t=time, in days find the substance's half-life, in days. round your answer to the nearest tenth.