Ch. 7 - Exponential Applications (Quiz Review)

The amount of ants in a colony, f, that is decaying can be modeled by                      f(x) = 800(.87)^x, where x is the number of days since the decay started. By what percentage is the colony decaying?

• 87%
• 13%
• 800%
• 8.7%

Tags

CCSS.HSF-IF.C.8B

The expression 12(1.015)^t models the population of elephants in a wildlife refuge after t years since 1975.
Is the population of elephants increasing or decreasing?

• Increasing (growth)

• Decreasing (decay)

Tags

CCSS.HSF-IF.C.8B

The expression 12(1.01)^t models the population of elephants in a wildlife refuge after t years since 1975. What does the value 12 represent?

• The predicted increase in number of elephants in the refuge each year.

• The predicted decrease in number of elephants in the refuge each year.

• The number of years it will take for the elephant population to stop increasing.

• The initial amount of elephants in the park.

Tags

CCSS.HSF.LE.B.5

The expression 12(1.01)^t models the population of elephants in a wildlife refuge after t years since 1975. What does the value 1.01 represent?

• The number of elephants was 1,015 in 1975.

• The number of elephants increases by 1% each year.

• The number of elephants increases by 10% each year.

Tags

CCSS.HSF.LE.B.5

Is the following function exponential growth, exponential decay, or neither?

g(x) = 740(.18)^x

• Exponential growth

• Exponential decay

• neither

Tags

CCSS.HSF-IF.C.8B

Cells dying off would be represented by which of the following?

• Exponential Growth

• Exponential Decay

Bacteria growing can be represented by which of the following?

• Exponential Growth

• Exponential Decay

Tags

CCSS.HSF-LE.A.1A

A new savings account is opened with $400 and gains 3% every year. What is the exponential function?

• f(x)=400(4)^x

• f(x)=400(.97)^x

• f(x)=400(1.03)^x

• f(x)=400(0.03)^x

Tags

CCSS.HSF.LE.A.2

Write an equation that models the following situation:
Samantha's hair was known to grow very rapidly. It began at a length of 6 in and grew at a rate of 14% a week.

• y = 6(0.14)^x

• y = 6(14)^x

• y = 6(1.14)^x

• y = 6(0.86)^x

Tags

CCSS.HSF.LE.A.2

Which of the following functions shows an initial amount of $15 and an increase of 35% each year?

• y = 15(35)^x
• y = 15(1.35)^x
• y = 15(0.35)^x
• y = 35(1.15)^x

Tags

CCSS.HSF.LE.A.2