- #1

karush

Gold Member

MHB

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- 5

$\tiny{6.1.01}$

this was a homework problem from Kilani High School

The half life of silicon 32 is $710$ years. If $10g$ are present now

how much will be present in $600$ yrs?

find out $k$ using

\$\begin{array}{rlll}

&A=A_0 e^{kt}

&

&(1)\\

\textsf{make }A=5

&5=10e^{k \cdot 710}

&

&(2)\\

&k=\dfrac{\ln \left(2\right)}{710}=0.00097626&

&(4)\\

\end{array}$

hence A=$10e^{-.00097626 \cdot 600}=5.56685=5.57g$

ok did this 3 times but :unsure:

possible typos

suggestions ?

this was a homework problem from Kilani High School

The half life of silicon 32 is $710$ years. If $10g$ are present now

how much will be present in $600$ yrs?

find out $k$ using

\$\begin{array}{rlll}

&A=A_0 e^{kt}

&

&(1)\\

\textsf{make }A=5

&5=10e^{k \cdot 710}

&

&(2)\\

&k=\dfrac{\ln \left(2\right)}{710}=0.00097626&

&(4)\\

\end{array}$

hence A=$10e^{-.00097626 \cdot 600}=5.56685=5.57g$

ok did this 3 times but :unsure:

possible typos

suggestions ?

Last edited: