Final answer:
The decimal equivalent of 9/11 is 0.818181... (repeating).
Step-by-step explanation:
To determine the decimal equivalent of 9/11, you divide the numerator (9) by the denominator (11). This gives you 0.818181..., which repeats endlessly. Therefore, the decimal equivalent of 9/11 is A) 0.818181... (repeating).