Calculating Exponential Population Growth: A 9th Grade Quiz

A small town has a population of 5,000 people. If the population grows by 3% each year, what will the population be after 5 years?

• 5500

• 6200

• 5796

• 6000

A bacteria culture starts with 200 bacteria and doubles in size every 4 hours. How many bacteria will there be after 24 hours?

• 3200

• 12800

• 6400

• 25600

A city has a population of 150,000 and is expected to grow at a rate of 2.5% per year. What will the population be in 10 years?

• 210000

• 192012

• 180000

• 200000

A certain species of fish in a lake is currently at 1,000. If the population increases by 50% each year, how many fish will there be after 3 years?

• 1500

• 2500

• 2000

• 3375

A town's population is currently 20,000 and is projected to grow exponentially. If the growth rate is 4% per year, what will the population be in 7 years?

• 25000

• 26463

• 30000

• 22000

A viral video has 1,000 views on the first day and is expected to gain 20% more views each day. How many views will it have after 10 days?

• 6000

• 5159

• 4000

• 7000

A forest has 2,000 trees, and the number of trees is increasing by 10% each year. How many trees will there be in 4 years?

• 2928

• 2800

• 2500

• 3000

A population of rabbits is currently 300 and is expected to grow by 15% each month. What will the population be after 6 months?

• 600

• 450

• 694

• 520

A town's population was 10,000 five years ago and is now 12,500. What is the average annual growth rate of the population over these five years?

• 3.25%

• 4.56%

• 5.00%

• 6.75%

A new species of plant is introduced to a greenhouse, starting with 50 plants. If the number of plants triples every year, how many plants will there be after 3 years?

• 1500

• 600

• 900

• 1350