Carbon-14 Decays at a Rate Proportional to the Amount Present

question 15

Multiple Choice

Carbon-14 decays at a rate proportional to the amount present. Which of the following is the differential equation for the amount, C, of carbon-14 present at time t?

• A) , with k positive
• B) , with k negative
• C) , with k positive
• D) , with k negative

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