Situation: Find Round A 31 gram sample of a substance that's a by-product of fireworks has a k-value of 0.1173. N= Noekt No = initial mass (at time t = 0) N = mass at time + 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.​