To find the population of bunnies after 5 months, we can use the given equation \( P = 12(3)^x \), where \( x \) represents the number of months since March.
In this case, we want to find \( P \) when \( x = 5 \):
\[ P = 12(3)^5 \]
First, we calculate \( 3^5 \):
\[ 3^5 = 243 \]
Now, substituting \( 243 \) back into the equation:
\[ P = 12 \times 243 \]
Calculating \( 12 \times 243 \):
\[ 12 \times 243 = 2916 \]
Thus, the population of bunnies after 5 months will be 2916.