Final answer:
The set that contains 3^512 is the set of Irrational Numbers.
Step-by-step explanation:
To determine which set contains 3^512, we need to understand the properties of different number sets. 3^512 is an irrational number because it cannot be expressed as a ratio of two integers. Irrational numbers cannot be expressed as fractions or decimals that terminate or repeat. Therefore, the answer is B. Irrational Numbers.