Exploring Exponential Growth and Equations in Real Life

A population of bacteria doubles every 3 hours. If there are initially 500 bacteria, how many will there be after 9 hours?

• 4000

• 8000

• 1000

• 2000

A car's value decreases by 20% each year. If the car is currently worth $15,000, what will its value be after 3 years?

• $9,600

• $7,680

• $12,000

• $10,000

A certain investment grows exponentially. If $1,000 is invested at an annual interest rate of 5%, how much will it be worth after 10 years?

• 1500.00

• 1200.50

• 2000.00

• 1628.89

A tree grows at a rate of 10% per year. If the tree is currently 2 meters tall, how tall will it be after 5 years?

• 4.0 meters

• 2.5 meters

• 5.0 meters

• 3.22 meters

A certain species of fish in a lake grows exponentially. If there are 200 fish now and the population doubles every year, how many fish will there be in 4 years?

• 2400

• 1600

• 3200

• 4000

A savings account earns interest compounded annually. If you deposit $2,000 at an interest rate of 3%, how much will you have after 5 years?

• 2500.00

• 3000.00

• 2318.55

• 2000.00

A viral video on social media gains views exponentially. If it starts with 1,000 views and doubles every day, how many views will it have after 7 days?

• 256000

• 128000

• 512000

• 64000

A certain type of mold grows exponentially. If a culture starts with 50 grams and doubles every 2 days, how much will there be after 10 days?

• 1600 grams

• 2000 grams

• 800 grams

• 400 grams

A smartphone's battery life decreases exponentially. If it starts with a full charge of 100%, and loses 15% each hour, what percentage of the battery will remain after 4 hours?

• 45%

• 50.625%

• 60%

• 70%

A town's population is 10,000 and is growing at a rate of 8% per year. What will the population be in 3 years?

• 12000

• 12597

• 13000

• 11500