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nini31575
14.07.2021 •
Mathematics
I know you have to use the half life formula but I don’t know how to use it could someone show how to find the solution step by step? Thank you
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Ответ:
Step-by-step explanation:
Note: these are typically two part questions...
you have the model and have to FIRST find a constant value "k"
once you have the "k" value you plug that into the model to finish the problem
e is "e 2.717" not a variable "e"
so... step 1.. fink k
you are told that the 1/2 life is 22.3 years...
so lets assume that we started with 2 units of lead, and waited for it to decrease to 1 (1 is 1/2 of 2)
you would have
1 = 2![e^{k * 22.3}](/tpl/images/1393/6748/ed4fc.png)
.5 =![e^{k * 22.3}](/tpl/images/1393/6748/ed4fc.png)
ln(.5) = 22.3k ln(e)
ln(e) = 1
ln(.5) = 22.3k
ln(.5) = 22.3k ln(e)
Ответ:
that would be D aka 8 hope this was helpful!
Step-by-step explanation: