Question 1011108
{{{y=pe^(-kt)}}}
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{{{ln(pe^(-kt))=ln(y)}}}
{{{ln(p)+(-kt)ln(e)=ln(y)}}}
{{{-kt*ln(e)=ln(y)-ln(p)}}}
{{{kt*1=ln(p)-ln(y)}}}
{{{k=(1/t)ln(p/y)}}}
Half Life gives you enough for the value of k.
{{{k=ln(2)/24400}}}
{{{k=2.841*10^(-5)}}}



150 grams becomes after 1000000 years:
{{{highlight(y=150*e^(-0.00002841*10^6))}}}------compute this.