Exploring Growth & Decay: Functions and Formulas Quiz

A population of bacteria doubles every 3 hours. If there are initially 500 bacteria, how many will there be after 12 hours?

• 4000

• 2000

• 10000

• 8000

A car's value decreases by 15% each year. If the car is currently worth $20,000, what will its value be after 4 years?

• $10,440.12

• $12,000.00

• $15,000.00

• $8,500.00

A certain investment grows at an annual rate of 8%. If you invest $1,000, how much will it be worth after 5 years?

• 1200.00

• 1469.33

• 2000.00

• 1000.00

A radioactive substance has a half-life of 10 years. If you start with 80 grams, how much will remain after 30 years?

• 5 grams

• 20 grams

• 10 grams

• 40 grams

The number of users on a social media platform increases by 25% each year. If there are currently 1,200 users, how many users will there be in 3 years?

• 2344

• 2000

• 1800

• 1500

A tree grows at a rate of 5% per year. If the tree is currently 10 feet tall, what will its height be after 6 years?

• 15.00 feet

• 10.50 feet

• 12.00 feet

• 13.40 feet

A certain species of fish in a lake is decreasing at a rate of 10% per year. If there are currently 1,500 fish, how many will be left after 2 years?

• 1350

• 900

• 1215

• 1000

A bank offers a savings account with a 6% annual interest rate compounded annually. If you deposit $2,000, how much will you have after 3 years?

• $2,500.00

• $2,000.00

• $2,100.00

• $2,382.03

The population of a town is 50,000 and is decreasing by 2% each year. What will the population be in 5 years?

• 45196

• 48000

• 52000

• 45000

A culture of yeast grows exponentially. If the initial amount is 200 grams and it triples every hour, how much will there be after 4 hours?

• 16200 grams

• 6000 grams

• 8000 grams

• 12000 grams