Problem 170 of 7
Correct the geometric-series modeling error in counting 12 monthly deposits as exponents 1 through 12 when the newest deposit earns no interest.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
catch wrong ratio, term count, time indexing, and finance interpretation mistakes.
Hidden until you reveal it.
Catch wrong ratio, term count, time indexing, and finance interpretation.
Enter your answer
Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Name the mistaken assumption in the model.
2. Replace the incorrect ratio, exponent range, or formula.
3. Explain how the corrected model matches the context.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Numerical repairs that do not identify the source of the modeling error.