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Taya2010 [7]
3 years ago
7

if a birthdat cake is cut into 12 pieces and five children each eat one piece, what fraction of the cake is gone?

Mathematics
1 answer:
klio [65]3 years ago
4 0

Answer:

5/12

Step-by-step explanation:

12 pieces of cake is the original amount and 5 kids ate it 5 pieces that means 5/12 of the cake it gone.

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The half-life of Radium-226 is 1590 years. If a sample contains 200 mg, how many mg will remain after 1000 years?
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$$Let $p=A \cdot e^{n t}$ \\$(p=$ present amount, $A=$ initial amount, $n=$ decay rate, $t=$ time)

\begin{aligned}&\Rightarrow \text { Given } p=\frac{A}{2} \ a t  \ t=1590 \\&\Rightarrow \frac{1}{2}=e^{1590n} \Rightarrow n=\frac{\ln (1 / 2)}{1590}=-0.00043594162\end{aligned}

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