Final answer:
The Perfect Fifth interval above B-flat is F, which can be determined by counting seven half-steps from the root note B-flat to reach F.
Step-by-step explanation:
The question "What is a Perfect Fifth above B-flat? (P5 up Bb)" is related to music theory, particularly to the concept of intervals. In music theory, a Perfect Fifth is one of the consonant intervals and is composed of seven half-steps from the root note. Starting from B-flat and moving up seven half-steps (Bb -> B -> C -> C# -> D -> D# -> E -> F), you arrive at F as the Perfect Fifth above B-flat.