It is normal based on the Central Limit Theorem. According to the theorem, an appropriately big sample (infinite) size from a population with a limited level of variance, the average of all samples from the same populace will be roughly equivalent to the mean of the population.
        
             
        
        
        
Answer:
−a^2 b^2 + 2a + 2b
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              a^2
Step-by-step explanation:
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First, find the area of the plot:
25*10=250
1000/250 is 4
the population density is 4 squirrels per square foot.