Situation:
Find the substance's half-life, in days.
Round your answer to the nearest tenth.
A 22 gram sample of a substance that's
used to sterilize surgical instruments has
a k-value of 0.138.
Enter the correct answer.
IN- Noe
-kt
DONE
No - initial mass (at time t-0)
+1?
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

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