To solve the expression \(-3^0 + 4.5\), we first need to evaluate \(-3^0\).
- Evaluate the exponent: Any non-zero number raised to the power of 0 is 1. Therefore, \(-3^0 = 1\) (it's important to note that \(-3^0\) represents \( -(3^0) \), which is still equal to \(-1\)).
So we have: \[ -3^0 + 4.5 = -1 + 4.5 = 3.5 \]
Based on these calculations, the correct representation from the provided choices is:
−3⁰ + 4.5 = −1⋅3⁰ + 4.5 = −1 + 4.5 = 3.5.
This was represented as: −3⁰ + 4.5=−1⋅3⁰+4.5=−1+4.5=3.5.
Thus, the correct answer is the last choice.