Question

7 a tempo marking of quarter - note = 60 means to sing one quarter note how often? sixty quarter notes per hour; one quarter note per second; one quarter note per sixty seconds; sixty quarter notes per second

Explanation:

Step1: Understand tempo meaning

Tempo marking of quarter - note = 60 means 60 quarter - notes in 60 seconds.

Step2: Calculate frequency

Since there are 60 quarter - notes in 60 seconds, the frequency is 1 quarter - note per second.

Answer:

One quarter note per second