# Exponential Equations Practice with Word Problems 2 ```Exponential growth and decay population
Name_______________________
1) The world population is the total number of living humans on Earth. As of today, it
is estimated to be 7,073,000,000 and is increasing at a rate of approximately 1.2% each
year.
a) Write an exponential equation to find
the population after ‘x’ number of years.
b) Use your equation to estimate the
population in 30 years.
2) The current population in the United States is about 315,000,000 and is increasing at
a rate of approximately 0.9% each year.
a) Write an exponential equation to find the population after ‘x’ number of years.
b) Use your equation to estimate the
population in 30 years.
3) Believe it or not - North Dakota was the nation's fastest-growing state in the past
year. The U.S. Census Bureau data shows that
North Dakota's population grew 2.2%, to 699,628
as the oil boom drew workers to the Bakken fields
in the western part of the state.
a) Write an exponential equation to find the
population after ‘x’ number of years.
b) Use your equation to determine the population in 30 years.
4) By contrast the state of Rhode Island’s population is decreasing. Last year the
population was 1,052,000 and declined by 0.22%.
a) Write an exponential equation to find the
population after ‘x’ number of years.
b) Use your equation to determine the population
in 30 years.
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