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Question

The half-life of lead is 22 years. How long will it take for a sample of this substance to

decay to 80% of its original amount
9 years ago

Answers

Damon
A = Ao * (1/2)^(n/22)

.8 = .5^(n/22)

log .8 = (n/22) log .5

n/22 = .3219

n =7.08 years
9 years ago

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