Exponential Growth and Decay Formula

A population of fish starts at 8,000 and increases by 6% per year.

What will the fish population be in 10 years?

What is the formula for exponential growth?

What is the formula for exponential decay?

What does "a" stand for in the exponential growth formula?

• final amount

• time

• original amount

• rate of growth

What does "r" stand for in the exponential growth formula?

• final amount

• time

• original amount

• rate of growth

What does "t" stand for in the exponential growth formula?

• final amount

• time

• original amount

• rate of growth

What does "y" stand for in the exponential growth formula?

• final amount

• time

• original amount

• rate of growth

The population of a town is decreasing at a rate of 5% per year. This year there are 10,000 people in this town, how many people will be left in 20 years from now? (round to the nearest whole number)

• 26,533 people

• 358 people

• 1 person

• 3,585 people

Annual sales for a fast food restaurant are $650,000 and are increasing at a rate of 4% per year. Use an exponential function to find the annual sales after 7 years.

Round to two decimal places (like dollars and cents).

The population of a school is 800 students and is increasing at a rate of 2% per year. Use an exponential function to find the population of the school after 9 years.

Round to the nearest whole number.