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What the answer plz help
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What the answer plz help

What the answer plz help-example-1
User Sevon
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1 Answer

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20 = 40e^-0.1446t
e^-0.1446t = 0.5

t = ln 0.5 / -0.1446
t = 4.8 days

User MrMDavidson
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