Answer:
Each hour, the concentration of the medicine reduces by 4%.
Step-by-step explanation:
The link between the time passed, t, in minutes, post-ingestion, and the concentration in the bloodstream, C (t), follows this formula:

The decay function is represented as:

Where:
y = final quantity
a = initial quantity
r = decay percentage
t = time
From the given equation, the decay percentage is:

Consequently, each hour, the concentration of the medicine diminishes by 4%.