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LuckyWell [14K]
1 year ago
14

The half-life of lead is 18 years. How long will it take for the sample of this substance to decay to 15%?a. Find your k

Mathematics
1 answer:
ipn [44]1 year ago
7 0

Solution

We are given

Half Life = 18 years

To solve for k

\begin{gathered} 0.5=e^{-18k} \\ ln(0.5)=-18k \\ k=-\frac{ln(0.5)}{18} \\ k=0.0385081767 \end{gathered}

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Give a correct interpretation of a 99% confidence level of 0.328 < μ < 0.486.
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Answer:

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Step-by-step explanation:

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Upper bound of the population mean is 0.486

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Therefore, the correct interpolation of the confidence interval is that we are 99% confident that the true value of the population mean is between 0.328 and 0.486

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Step-by-step explanation:

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4 0
3 years ago
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scZoUnD [109]
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