Solve the differential equation. 
Definitions:
Causal Variable
A variable that is presumed to cause or determine the outcome of interest in a research study.
Quantitative Model
A quantitative model uses mathematical equations and numerical data to represent a situation or problem, enabling objective analysis and predictions.
Qualitative Model
A model that relies on non-numeric data, such as expert opinion or case studies, to analyze and predict outcomes or behaviors.
Degree of Uncertainty
A measure or assessment of the unpredictability or risk associated with a decision, project, or future event.
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