Question

In 2010, the population of a city was 88,000. From 2010 to 2015, the population grew by 4%. From 2015 to 2020, it fell by 3%. To the nearest 100 people, what was the population in 2020?

Answer 1

To estimate the population in 2020, we calculate the growth and decline in population from 2010 to 2020. The population in 2020 is approximately 88,800 people.

Step-by-step explanation:

To find the population in 2020, we need to calculate the growth and decline in population from 2010 to 2020.

First, we calculate the population in 2015 after a growth of 4% from 2010:

Population in 2015 = Population in 2010 + (Population in 2010 * Growth rate)

Population in 2015 = 88000 + (88000 * 0.04) = 88000 + 3520 = 91520.

Next, we calculate the population in 2020 after a decline of 3% from 2015:

Population in 2020 = Population in 2015 - (Population in 2015 * Decline rate)

Population in 2020 = 91520 - (91520 * 0.03) = 91520 - 2745.6 = 88774.4.

Rounding this to the nearest 100 people gives us a population of 88,800 in 2020.