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Assignment 1 Discussion—Population Growth for Broken Arrow Oklahoma To study the growth of a population mathematically, we use the concept of exponential models. Generally speaking, if we want to predict the increase in the population at a certain perio

Assignment 1 Discussion—Population Growth for Broken Arrow Oklahoma

 

 

To study the growth of a population mathematically, we use the concept of exponential models. Generally speaking, if we want to predict the increase in the population at a certain period in time, we start by considering the current population and apply an assumed annual growth rate. For example, if the U.S. population in 2008 was 301 million and the annual growth rate was 0.9%, what would be the population in the year 2050? To solve this problem, we would use the following formula:

P(1 + r)n 

In this formula, P represents the initial population we are considering, r represents the annual growth rate expressed as a decimal and n is the number of years of growth. In this example, P = 301,000,000, r = 0.9% = 0.009 (remember that you must divide by 100 to convert from a percentage to a decimal), and n = 42 (the year 2050 minus the year 2008). Plugging these into the formula, we find:

P(1 + r)n = 301,000,000(1 + 0.009)42 
= 301,000,000(1.009)42 
= 301,000,000(1.457) 
= 438,557,000

Therefore, the U.S. population is predicted to be 438,557,000 in the year 2050. 

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