Final answer:
The expression 23 to the 2nd power is written as 23^2, which equals 529. This is the result of multiplying 23 by itself.
Step-by-step explanation:
To write the expression 23 to the 2nd power using one or more exponents, we simply raise 23 to the power of 2, which means multiplying 23 by itself. In mathematical terms, this is denoted as 232, and it equates to 23 × 23.
232 = 23 × 23 = 529
Therefore, the answer to using one or more exponents to write the expression 23 to the 2nd power is 529, which matches option d) in the provided choices.