There are 600 old-growth trees in a forested area measuring 100 acres. A biologist calculates a unit rate based on the data that was collected. Determine what conclusion the biologist can make about the forest.

Based on the given data that there are 600 old-growth trees in a forested area of 100 acres, the biologist can conclude that the unit rate of old-growth trees in this forest is 6 trees per acre.