Suppose the population of the world was about 6.2 billion in 2000. Birth rates around that time ranged from 35 to 40 million per year and death rates ranged from 15 to 20 million per year. Let's assume that the carrying capacity for world population is 20 billion. (a) Write the logistic differential equation for these data. (Because the initial population is small compared to the carrying capacity, you can take k to be an estimate of the initial relative growth rate. Calculate k using the maximum birth rate and maximum death rate. Let t= 0 correspond to the year 2000.) 2 (b) Use the logistic model to estimate the world population (in billions) in the year 2010. (Round your answer to the nearest hundredth.) billion Compare this result with the actual population of 6.9 billion. This result ---Select-- ✓the actual population of 6.9 billion. (c) Use the logistic model to predict the world population n billions) in the years 2100 and 2400. (Round your answers to the nearest hundredth.)

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Suppose the population of the world was about 6.2 billion in 2000. Birth rates around that time ranged from 35 to 40 million per year and death rates ranged from 15 to 20 million per year. Let's assume that the carrying capacity for world population is 20 billion.
(a) Write the logistic differential equation for these data. (Because the initial population is small compared to the carrying capacity, you can take k to be an estimate of the initial relative growth rate. Calculate k using the maximum birth rate and maximum death rate. Let t = 0 correspond to the year
2000.)
dt
(b) Use the logistic model to estimate the world population (in billions) in the year 2010. (Round your answer to the nearest hundredth.)
billion
Compare this result with the actual population of 6.9 billion.
This result ---Select---
✓the actual population of 6.9 billion.
(c) Use the logistic model to predict the world population (in billions) the years 2100 and 2400. (Round your answers to the nearest hundredth.)
billion
billion
2100
2400
Transcribed Image Text:Suppose the population of the world was about 6.2 billion in 2000. Birth rates around that time ranged from 35 to 40 million per year and death rates ranged from 15 to 20 million per year. Let's assume that the carrying capacity for world population is 20 billion. (a) Write the logistic differential equation for these data. (Because the initial population is small compared to the carrying capacity, you can take k to be an estimate of the initial relative growth rate. Calculate k using the maximum birth rate and maximum death rate. Let t = 0 correspond to the year 2000.) dt (b) Use the logistic model to estimate the world population (in billions) in the year 2010. (Round your answer to the nearest hundredth.) billion Compare this result with the actual population of 6.9 billion. This result ---Select--- ✓the actual population of 6.9 billion. (c) Use the logistic model to predict the world population (in billions) the years 2100 and 2400. (Round your answers to the nearest hundredth.) billion billion 2100 2400
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