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 = 650t + 32,500 - 22,500e-0.02t
B. y = -650t - 32,500 - 22,500e0.02t
C. y = 650t + 32,500 - 22,500e0.02t
D. y = -650t + 32,500 - 22,500e-0.02t
Answer: C
Mathematics
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A. 0.125 mL B. 18 mL C. 1500 mL D. 125 mL
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Perform the indicated operation.-2.1 + (-7.7)
A. 9.8 B. 5.6 C. -9.8 D. -5.6
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Evaluate the expression.
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Fill in the blank(s) with the appropriate word(s).
Mathematics