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babymother [125]
3 years ago
7

226Ra has a half-life of 1599 years. How much is left after 1000 years if the initial amount was 10 g?

Mathematics
1 answer:
Ray Of Light [21]3 years ago
8 0
\bf \textit{Amount for Exponential Decay using Half-Life}\\\\
A=P\left( \frac{1}{2} \right)^{\frac{t}{h}}\qquad 
\begin{cases}
A=\textit{accumulated amount}\\
P=\textit{initial amount}\to &10\\
t=\textit{elapsed time}\to &1000\\
h=\textit{half-life}\to &1599
\end{cases}
\\\\\\
A=10\left( \frac{1}{2} \right)^{\frac{1000}{1599}}
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The probability that a high school student in in the marching band is 0.47

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the probability that a student plays a varsity sport if we know she is in the marching band is 0.51063......Answer

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