N - correct answer ✔size of populations
N0 - correct answer ✔initial population size
delta N=B-D+I-E - correct answer ✔births-deaths+immmegration-
emmigration
delta N - correct answer ✔Nt+1 = Nt
delta N = B-D - correct answer ✔population is closed
dN/dt= B-D - correct answer ✔our model is continuous
B/D are directly proportional to N - correct answer ✔B=bxN
D=dxN
differential equation - correct answer ✔dN/dt-rN
explicit formula - correct answer ✔Nt=N0e^rt
discrete model - correct answer ✔Nt+1 = lambdaNt
difference equation