The Zero Power Rule of integer exponents states that any non-zero number raised to the power of zero is equal to 1.
For the expression \(-4^0\):
\[ -4^0 = 1 \]
Now, substituting this back into the expression, we have:
\[ -4^0 \cdot 15 = 1 \cdot 15 = 15 \]
Thus, the final result is:
\[ -4^0 \cdot 15 = 15 \]