Question: In 2014, the worlds population reached 7.17 billion and was increasing at a rate of 1.1% per year. Assume that this growth rate remains constant.

In 2014, the world’s population reached 7.17 billion and was increasing at a rate of 1.1% per year. Assume that this growth rate remains constant. (In fact, the growth rate has decreased since 2008.)

(a) Write a formula for the world population (in billions) as a function of the number of years since 2014.

(b) Estimate the population of the world in the year 2020.

(c) Sketch world population as a function of years since 2014. Use the graph to estimate the doubling time of the population of the world.

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