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?

Tags

CCSS.HSF-LE.A.1C

What is the formula for exponential growth?

Tags

CCSS.HSF-IF.C.8B

What is the formula for exponential decay?

Tags

CCSS.HSF-IF.C.8B

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

• final amount

• time

• original amount

• rate of growth

Tags

CCSS.HSF-IF.C.8B

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

• final amount

• time

• original amount

• rate of growth

Tags

CCSS.HSF-IF.C.8B

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

• final amount

• time

• original amount

• rate of growth

Tags

CCSS.HSF-IF.C.8B

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

• final amount

• time

• original amount

• rate of growth

Tags

CCSS.HSF-IF.C.8B

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

Tags

CCSS.HSF-LE.A.1C

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.