Exponential Growth: Real-World Applications for 8th Grade

A population of rabbits doubles every year. If there are 50 rabbits at the start, how many will there be after 3 years?

• 400

• 800

• 200

• 100

A bank offers an interest rate of 5% compounded annually. If you deposit $1,000, how much money will you have after 4 years?

• 1000.00

• 1100.00

• 1300.00

• 1215.51

A bacteria culture grows exponentially. If there are 200 bacteria now and it doubles every hour, how many will there be after 5 hours?

• 6400

• 3200

• 12800

• 4000

A car's value decreases by 15% each year. If the car is worth $20,000 now, what will its value be after 2 years?

• $16,000

• $12,000

• $14,450

• $18,000

A tree grows at a rate of 10% per year. If it is currently 3 meters tall, how tall will it be after 5 years?

• 6.00 meters

• 5.00 meters

• 4.83 meters

• 3.30 meters

A certain investment grows at a rate of 8% per year. If you invest $500, how much will it be worth after 3 years?

• 500.00

• 800.00

• 629.86

• 750.00

A certain species of fish in a lake increases its population by 25% each year. If there are currently 400 fish, how many will there be in 2 years?

• 600

• 625

• 500

• 480

A smartphone loses 20% of its value each year. If it costs $800 now, what will its value be after 3 years?

• 640

• 720

• 409.6

• 512

A savings account has an initial balance of $2,000 and earns 6% interest compounded annually. What will the balance be after 5 years?

• $2,676.45

• $3,000.00

• $2,500.00

• $2,200.00

A viral video on a social media platform gains 1,000 views on the first day and doubles its views every day. How many views will it have after 4 days?

• 16000

• 8000

• 2000

• 4000