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ExtremeBDS [4]
3 years ago
12

What the answer plz help

Mathematics
1 answer:
ratelena [41]3 years ago
4 0
20 = 40e^-0.1446t
e^-0.1446t = 0.5

t  = ln 0.5 / -0.1446
t =  4.8 days

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