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2 years ago

15

If line r is parallel to —- ?

1 answer:

jek_recluse [69]2 years ago

4 0

Answer:

the correct answer is 10

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2 years ago

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

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$\bf \textit{Amount for Exponential Decay using Half-Life}\\\\
A=P\left( \frac{1}{2} \right)^{\frac{t}{h}}\qquad 
\begin{cases}
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t=\textit{elapsed time}\to &1000\\
h=\textit{half-life}\to &1599
\end{cases}
\\\\\\
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