Real-World Exponential Models: Growth and Decay Quiz

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

• 10000

• 8000

• 4000

• 6000

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

• $15,000.00

• $12,000.00

• $10,440.12

• $8,500.00

A bank offers an interest rate of 5% compounded annually. If you deposit $1,000, how much money will you have after 10 years?

• 2000.00

• 1628.89

• 1500.00

• 1200.50

A certain species of fish in a lake grows at a rate of 10% per year. If there are currently 200 fish, how many will there be in 5 years?

• 400

• 250

• 322

• 180

A viral video is viewed by 1,000 people on the first day and the views double each day. How many views will it have on the 7th day?

• 256000

• 128000

• 64000

• 32000

A tree grows at a rate of 8% per year. If it is currently 15 feet tall, how tall will it be after 3 years?

• 20.00 feet

• 16.50 feet

• 18.90 feet

• 17.25 feet

A certain investment grows exponentially, doubling every 5 years. If you invest $2,000, how much will it be worth after 15 years?

• $16,000

• $32,000

• $4,000

• $8,000

A smartphone's battery lasts for 24 hours when fully charged. If it loses power at a rate of 20% per hour, how much battery will be left after 5 hours?

• 75%

• 32.77%

• 50%

• 10%

A town's population is 10,000 and is increasing by 3% each year. What will the population be in 10 years?

• 12000

• 15000

• 11000

• 13439

A certain type of mold grows at a rate of 50% per day. If you start with 10 grams, how much will you have after 4 days?

• 100 grams

• 40 grams

• 25 grams

• 50.625 grams