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Chapter 4, Go Tutorial Problem, Section 4.7, Additional Question 001 If t is in years since 1990, one model for the population of the world, P , in billions is 40 P = . 1+ 11e-0-07r a) What does this model predict for the maximum population of the world? p: :1 billion. b) According to this model, when will the earth's population reach 20 billion? Round to an integer. The year :1. Click if you would like to Show Work for this question: Qpen Show Work