What does a dot do to the value of a note or rest

Answer 1

In music notation, a dot placed after a note or rest indicates that its duration is increased by half. This means that the value of the note or rest is increased by 50% of its original value. For example, a dotted quarter note (♩.) would have a duration equal to three eighth notes (∪∪∪). Similarly, a dotted half rest (⇓.) would have a duration equal to three quarter rests (⇓⇓⇓).