Exploring Exponential Growth & Decay in Real Life

A bacteria culture doubles in size every 3 hours. If the initial amount is 500 bacteria, how many bacteria will there be after 12 hours?

• 8000

• 16000

• 4000

• 2000

Tags

CCSS.HSF.LE.A.4

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

• $12,000

• $8,000

• $10,240

• $15,360

Tags

CCSS.HSF.BF.A.2

A certain investment grows at a rate of 5% per year. If you invest $1,000, how much will it be worth after 4 years?

• 1000.00

• 1215.51

• 1100.00

• 1500.00

Tags

CCSS.HSF.BF.A.2

A tree grows at a rate of 2 inches per year. If it starts at 3 feet tall, what will its height be after 5 years?

• 46 inches

• 40 inches

• 50 inches

• 30 inches

Tags

CCSS.HSF.BF.A.2

The population of a town is 10,000 and is expected to grow by 10% each year. What will the population be after 2 years?

• 11500

• 11000

• 13000

• 12100

Tags

CCSS.HSF.BF.A.2

If 2^x = 64, what is the value of x?

• 6

• 5

• 7

• 8

Tags

CCSS.HSF.LE.A.4

If 3^(2x) = 81, what is the value of x?

• 2

• 3

• 4

• 1

A computer's memory is doubled every year. If it starts with 256 MB, how much memory will it have after 5 years?

• 8192 MB

• 2048 MB

• 4096 MB

• 512 MB

Tags

CCSS.HSF.BF.A.2

If 5^(x-1) = 125, what is the value of x?

• 5

• 3

• 4

• 6

A savings account earns 6% interest compounded annually. If you deposit $500, how much will you have after 3 years?

• $600.00

• $575.00

• $550.00

• $595.51