Answer:
The average density of deer in 1923 was 1 deer per 8 acres
Step-by-step explanation:
Given -
In 1923, the population of deer rose to

The density of any species is equal to total population divided by total area of the land in which this population is residing.

Where d represents the density
P represents the population and
A represents the area of land
Substituting the given values in above equation, we get -

Thus, the average density of deer in 1923 was 1 deer per 8 acres