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OpenStudy (anonymous):
Situation: A 15 gram sample of a substance that's a by-product of fireworks has a k-value of .1405. find the substance's half-life, in days. round to the nearest tenth
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OpenStudy (anonymous):
\[A_0k^t\]
OpenStudy (anonymous):
\[A_0=15\] You know what k is
OpenStudy (anonymous):
set them all equal =7.5
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