Problem 164 of 7
A student classifies a radioactive substance decays by 10% every hour as linear because it loses 10 units each hour. Diagnose the error.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
find incorrect difference/ratio reasoning.
Hidden until you reveal it.
Student classification must contain a specific reasoning mistake.
Enter your answer
Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Restate the student's classification.
2. Check whether the described change is additive or multiplicative.
3. Name the correct model and explain the reasoning error.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Answers that only state the model without diagnosing reasoning.