Respuesta :

19 1/2 appointments because 6 1/2 hours divided by 1/3 of an hour (when the stylist schedules an appointment each time) equals 19 1/2. hope this helps!
6 hours is 360 minutes plus 30=390 minutes
1/3 hours is 20 minutes
390 minutes/20 minutes = 19.5 so 19 complete appointments