Answer:
There are 32 home sites in the plot 
Explanation:
Unit rate are defined as the rates are expressed as a quantity as 1 such as 4 meter per second or 4 km/hr.
As per the statement:
A builder has an 8-acre plot divided into 1/4 acre home sites. 
By definition of unit rate;
Unit rate per home site = 

⇒ Number of home sites = 32 
Thus, there are 32 home sites in the plot