In the following figure, f(t) gives the population P?1 of a certain bacteria culture at time t after a portion of bactericide A was introduced into the population at t = 0. The graph of g gives the population P?2 of a similar bacteria culture at time t after a portion of bactericide B was introduced into the population at t = 0.
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Which population is decreasing faster at t?1 and at t?2?
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A. The populations are decreasing at the same rate at t?1, P?2 is decreasing faster at ?t?2
B. ?P?1 is decreasing faster at t?1, the populations are decreasing at the same rate at t?2
C. ?P?2 is decreasing faster at t?1, ?P?1is decreasing faster at t?2
D. P1is decreasing faster at t?1, ?P?2is decreasing faster at t?2
Answer: C
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