Answer:
3.5 trees per hectare
Step-by-step explanation:
The population density of trees species A is 3.5 per hectare. To find the number of trees per hectare, simply divide the two figures together. 11,025 (the number of trees) divided by 3,150 (the number of overall hectares in the plot of land) gives a value of 3.5 trees per hectare.