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When predicting population growth, demographers must consider birth and death rates as well as the net change caused by the difference between the rates of immigration and emigration. Let P be the population at time t and let N be the net increase per unit time due to the difference between immigration and emigration. So, the rate of growth of the population is given by 
, N is constant. Solve the differential equation to find P as a function of ?t.
?
A. ?
?
B. 
C. 
D. 
E. 
Answer: A
Mathematics
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