Grade 7 Exponential Expressions in Real-Life Scenarios

A bacteria culture doubles in size every hour. If the initial size is 5 bacteria, how many bacteria will there be after 4 hours?

• 100

• 80

• 40

• 20

A computer's processing speed is measured in gigahertz (GHz). If a computer has a speed of 2^3 GHz, what is its speed in GHz?

• 2 GHz

• 8 GHz

• 16 GHz

• 4 GHz

A certain type of plant grows at a rate of 2^4 inches per week. How tall will the plant be after 3 weeks?

• 32 inches

• 48 inches

• 64 inches

• 24 inches

A video game character gains experience points at a rate of 5^2 points per level. How many points does the character gain after reaching level 3?

• 25 points

• 100 points

• 75 points

• 50 points

A population of rabbits triples every month. If the initial population is 10 rabbits, how many rabbits will there be after 2 months?

• 90 rabbits

• 50 rabbits

• 30 rabbits

• 120 rabbits

A square has a side length of 2^3 inches. What is the area of the square in square inches?

• 16 square inches

• 64 square inches

• 48 square inches

• 32 square inches

A car's value depreciates by half every year. If the car's initial value is $16,000, what will its value be after 3 years?

• $2,000

• $1,000

• $4,000

• $8,000

A light bulb lasts for 2^5 hours. How many hours does the light bulb last?

• 32 hours

• 40 hours

• 24 hours

• 16 hours

A computer program runs in 2^6 seconds. How many seconds does it take for the program to run?

• 32

• 128

• 256

• 64