Solve the problem. If a population is changed by either immigration or emigration, a model for the population is 
where y is the population at time t and f(t) is some function of t that describes the net effect of the emigration/immigration. Assume that k = 0.02 and y(0) = 10,000. Solve this differential equation for y, given that 
A. y = -100t + 5000 + 5000e-0.02t
B. y = 100t + 5000 + 5000e-0.02t
C. y = -100t - 5000 + 5000e0.02t
D. y = 100t + 5000 + 5000e0.02t
Answer: D
Mathematics
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D. 
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