Exploring Exponential Growth: Tripling Challenges for 7th Graders

A bacteria culture triples in size every hour. If you start with 5 bacteria, how many will there be after 3 hours?

• 135

• 15

• 100

• 45

A tree grows in height by tripling its size every year. If the tree is 2 feet tall now, how tall will it be after 2 years?

• 24 feet

• 12 feet

• 6 feet

• 18 feet

A video game character earns 10 points and then triples their score every level. How many points will the character have after reaching level 4?

• 100

• 90

• 270

• 30

A certain species of fish triples its population every month. If there are 15 fish in a pond now, how many will there be in 4 months?

• 45

• 960

• 180

• 1215

A savings account has an initial deposit of $100, and the amount triples every year. How much will be in the account after 2 years?

• $600

• $1200

• $300

• $900

A viral video gets 50 views on the first day and triples its views each subsequent day. How many views will it have after 5 days?

• 4050

• 2025

• 1000

• 1500

A plant's height triples every week. If it is currently 3 inches tall, what will its height be after 3 weeks?

• 243 inches

• 81 inches

• 27 inches

• 9 inches

A town's population is 1,000 and it triples every decade. What will the population be in 20 years?

• 3000

• 6000

• 12000

• 9000

A computer program's efficiency triples every update. If it processes 200 tasks now, how many tasks will it process after 3 updates?

• 1200

• 5400

• 600

• 1800

A charity event raises $200 on the first day and triples the amount raised each day. How much will be raised after 4 days?

• 600

• 1800

• 1200

• 5400