3/4 is a time signature, not a key signature.
The scale with four sharps in its key signature is the E major scale.
The scale that has two flats in its key signature is the key of Bb major.
The scale with 2 flats in its key signature is the key of Bb major.
A major scale and its relative minor scale share the same key signature.
The scale with two sharps in the key signature is called the D major scale.
A minor scale shares the same key signature as its relative major scale.
The key signature of a musical scale with two flats is Bb major.
The key signature for a harmonic minor scale typically has raised seventh note compared to the natural minor scale.
The key signature of the harmonic minor scale typically has raised seventh note compared to the natural minor scale.
The key signature indicates which notes are sharp, natural, or flat. Every key has a specific signature.
The key signature of the C minor scale has three flats: B flat, E flat, and A flat.
D major has a key signature of F sharp and C sharp D minor has a key signature of B flat