Algebra-1

Question Analysis
This question tests the student's ability to recognize and write an exponential decay equation based on a given scenario.

Key Concept Explanation
In an exponential relationship, the dependent variable changes by a constant relative rate. The general form of an exponential equation is  (), where is the initial value and is the growth/decay factor.

Step-by-step Solution
1. Identify the initial value: The initial amount is 100 grams, so