Problem 131 of 7
Explain why a radioactive substance decays by 2% of its mass every day is not the same as adding a fixed amount each interval.
Using a hint is okay. It just tells the trainer to give you a little more review.
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reason about changing base amount.
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Context must involve repeated percent change applied to a changing amount.
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Your answer is equivalent to the expected form.
Walkthrough
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1. Identify the current amount as the base for the percent.
2. Explain that the current amount changes after each interval.
3. Therefore the actual amount of change is not fixed.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Stating only that percent is exponential without explaining why fixed change fails.