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13 August, 22:27

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.

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  1. 13 August, 23:24
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    Going by the formula, Half-Life = ln (.5) / k

    Half-Life =.693147 /.1205

    Half-Life = 5.75 days and rounded to nearest tenth,

    Half-Life = 5.8 days
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