The Zero Power Rule states that any non-zero number raised to the power of zero is equal to 1. Therefore, for the expression \((-1.478)^0\):
\[ (-1.478)^0 = 1 \]
Now substitute this back into the equation:
\[ 2.3 + (-1.478)^0 = 2.3 + 1 \]
Now, calculating the sum:
\[ 2.3 + 1 = 3.3 \]
Thus, the correct response is:
3.3