The population of the world was 7.1 billion in 2013, and the observed relative growth rate was 1.1% per year. a) estimate how long it takes the population to double. (round your answer to two decimal places.) b) estimate how long it takes the population to triple. (round your answer to two decimal places.)

A) 63.36 years.

B) 100.42 years.

Step-by-step explanation:

We have been given that the population of the world was 7.1 billion in 2013, and the observed relative growth rate was 1.1% per year.

A) Since we know that population increases exponentially, therefore we will use our given information to form an exponential model for population increase and then we will solve for the time by which our population will be double.

Now let us solve for t using logarithm.

Therefore, it will take 63.36 years the population to be double.

B) Now we will find the number of years it will take the population to be triple of its size.

Now let us solve for t using logarithm.        

Therefore, it will take 100.42 years the population to triple of its size.

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