Maria is working on a sculpture. In the last 13 days, she has worked on the sculpture for 39 hours. If she spent the same number of hours each day on the sculpture, she worked on the sculpture for hour(s) each day.
To find the number of hours Maria worked on the sculpture each day, we need to divide the total number of hours worked (39) by the number of days (13): 39 hours / 13 days = <<39/13=3>>3 hours/day. Answer: \boxed{3}.
