A radioactive substance decays at a rate of 6% per month. If...

Question Analysis
This problem tests the understanding of the exponential decay model and the ability to identify the decay rate for a monthly period.

Key Concept Explanation
In the exponential decay model , the term represents the periodic decay rate. For a monthly decay rate, should be a negative decimal.

Step-by-step Solution
1. Identify the given values: Initial amount grams, monthly decay rate