Explore Exponential Growth & Percent Increase Challenges

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

• 4000

• 2000

• 1000

• 3000

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?

• $18,000

• $12,000

• $16,000

• $14,450

A tree grows at a rate of 5% per year. If the tree is currently 10 feet tall, how tall will it be after 4 years?

• 10.5 feet

• 15 feet

• 11 feet

• 12.16 feet

A smartphone's price increases by 20% during a sale. If the original price is $300, what is the sale price after the increase?

• $240

• $450

• $300

• $360

A town's population is 10,000 and is expected to grow by 8% each year. What will the population be after 3 years?

• 12597

• 12000

• 11500

• 13000

A bank account earns 6% interest compounded annually. If you deposit $1,000, how much will you have in the account after 5 years?

• 1200.00

• 1338.23

• 1000.00

• 1500.00

A plant grows by 12% each month. If it is currently 15 cm tall, what will its height be after 6 months?

• 32 cm

• 29.61 cm

• 18 cm

• 25 cm

A video game console's price was $400, but it increased by 25% during the holiday season. What is the new price?

• $350

• $500

• $450

• $600

A company’s revenue increased from $50,000 to $65,000 in one year. What is the percent increase in revenue?

• 25%

• 30%

• 15%

• 40%

A savings account has an annual interest rate of 4%. If you start with $2,000, how much will you have after 3 years, assuming the interest is compounded annually?

• $2,249.73

• $2,000.00

• $2,080.00

• $2,500.00