Population Growth and Decay: Yearly Challenges for 8th Graders

A town has a population of 5,000 people. If the population grows by 3% each year, what will the population be after 2 years?

• 5500

• 5200

• 5305

• 5400

A certain species of fish in a lake has a population of 1,200. If the population decreases by 10% each year, what will the population be after 3 years?

• 900

• 875

• 1,080

• 1,000

A city has a population of 20,000. If it is projected to grow by 4% annually, how many people will live in the city after 5 years?

• 22000

• 24333

• 30000

• 25000

A forest has 10,000 trees. If the number of trees decreases by 15% each year due to disease, how many trees will remain after 4 years?

• 4000

• 7500

• 6000

• 5220

A small island has a population of 2,500. If the population increases by 5% each year, what will the population be after 3 years?

• 2894

• 2700

• 3000

• 2500

A certain bacteria culture starts with 500 bacteria and doubles in size every hour. How many bacteria will there be after 4 hours?

• 2000

• 8000

• 4000

• 10000

A town's population is currently 15,000. If it is expected to decline by 2% each year, what will the population be in 3 years?

• 13800

• 14118

• 15000

• 14500

A zoo has 800 animals. If the number of animals decreases by 8% each year, how many animals will be left after 2 years?

• 640

• 720

• 677

• 600

A village has a population of 3,000. If the population grows by 6% each year, what will the population be after 4 years?

• 3600

• 3787

• 4000

• 3500

A population of 1,000 rabbits decreases by 20% each year due to hunting. How many rabbits will be left after 2 years?

• 640

• 500

• 720

• 800