Exponential Functions Percent

Marilyn collects old dolls. She purchases a doll for $450. Research shows this doll's value will increase by 2.5% each year. Write an equation that determines the value, V, of the doll t years after purchase.

• V = 450(1 + 0.025)^t

• V = 450(1 – 0.025)^t

• V = 450(1 + 2.5)^t

• V = 450(1 – 2.5)^t

Tags

CCSS.HSF.LE.A.2

The population of a town is currently 6342 and is increasing by a rate of 1.3% each year. Which function represents the population of people, P, after t years.

• P = 6342(1 + 1.3)^t

• P = 6342(1 – 1.3)^t

• P = 6342(1 + .013)^t

• P = 6342(1 – .013)^t

Tags

CCSS.HSF.LE.A.2

Rhonda deposited $3000 in an account in the Merrick National Bank, earning 4.2% interest, compounded annually. She made no deposits or withdrawals. Write an equation that can be used to find B, her account balance after t years.

• B = 3000(1 – 4.2)^t

• B = 3000(1 + 4.2)^t

• B = 3000(1 – 0.042)^t

• B = 3000(1 + 0.042)^t

A car was purchased for $25,000. Research shows that the car has an average yearly depreciation rate of 18.5%. Create a function that will determine the value, V(t), of the car t years after purchase.

• V(t) = 25000(1 – 0.185)^t

• V(t) = 25000(1 + 0.185)^t

• V(t) = 25000(1 – 18.5)^t

• V(t) = 25000(1 + 18.5)^t

Tags

CCSS.HSF.LE.A.2

• 1.4%

• 2.8%

• 14%

• 28%

Tags

CCSS.HSF-LE.A.1A

The bear population in a given area is currently 1580. They anticipate the bear population to decrease by 2% each year. Which function represents the population of bears, B, after t years.

• B = 1580(0.02)^t

• B = 1580(1 – 0.02)^t

• B = 1580(1 + 0.02)^t

• B = 1580(1 – 0.2)^t

Tags

CCSS.HSF.LE.A.2

what is the percent increase/decrease of this exponential function?

y=47(1.09)^x

Tags

CCSS.HSF-IF.C.8B

Identify the percent (%) increase or decrease for the following function. f(x) = 35 (1 – 0.06)

• Increase by 6%

• Decrease by 0.06%

• Increase by 0.06%

• Decrease by 6%

Tags

CCSS.HSF-IF.C.8B

The population of deer on an island is given by P(x) = 100(0.85)^x, where x represents the number of years. Determine the percent of change the population of deer per year.

• 85% decrease

• 15% decrease

• 85% increase

• 15% increase

Tags

CCSS.HSF-IF.C.8B

Which has a horizontal asymptote?

• Exponential

• Logarithmic

• Both

Tags

CCSS.HSF-IF.C.7D