Final answer:
The problem 5²/2 calculates to 12.5, which does not match any of the choices given, so the answer is 'None of the above.'
Step-by-step explanation:
The question provided asks us to solve for 5²/2, which involves basic arithmetic and exponent rules.
The exponent notation 5² signifies 5 multiplied by itself, which results in 25.
After determining that 5² equals 25, we then need to divide by 2 to get the final result.
Therefore, we perform the following calculation:
5² = 5 × 5 = 25
Next, we divide by 2:
25 / 2 = 12.5
Since none of the options given match the correct answer of 12.5, the appropriate selection would be: None of the above.