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The half-life of radium is 1620 years. Find the constant k in the formula when the time is given in years. I am supposed to use y=Ce^kt I think.
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The half-life of radium is 1620 years. Find the constant k in the formula when the time is given in years. I am supposed to use y=Ce^kt I think.

User Bluescreen
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1 Answer

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e^(1620k)=0.5
Taking natural logs of both sides, we get:

1620k=ln\ 0.5=-0.693

k=(-0.693)/(1620)=-0.000428
User Hendrixchord
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