what is the value of $lfloor - 12\rfloor$?\n-13\n-12\n12\n13

Explanation:

Step1: Recall floor - function definition

The floor function $\lfloor x\rfloor$ gives the greatest integer less than or equal to $x$.

Step2: Apply to - 12

For $x = - 12$, the greatest integer less than or equal to $-12$ is $-12$ itself.

Answer:

B. -12