One model of Earth's population growth is , P(t)=64/(1+11e^-.08t) where t is measured in years since 1990, and P is measured in billions of people. Which of the following statements are true?
A.) The population of earth will grow exponentially too for a while but then start to slow down its growth
B.) In 1990, there will be 5.3billion people
C.) The carrying capacity of earth is 5.33 billion people
D.) The population of earth will steadily increase by a steady rate of 8% per year

Question

One model of Earth's population growth is , P(t)=64/(1+11e^-.08t) where t is measured in years since 1990, and P is measured in billions of people. Which of the following statements are true?
A.) The population of earth will grow exponentially too for a while but then start to slow down its growth
B.) In 1990, there will be 5.3billion people
C.) The carrying capacity of earth is 5.33 billion people 
D.) The population of earth will steadily increase by a steady rate of 8% per year