Exponential Growth and Decay Applications

What does "r" represent in both of the formulas to calculate exponential growth and decay?

f(t) = a (1 - r)^t

f(t) = a (1 + r)^t

• Radical

• Regular

• Real Time

• Rate of Decay/Growth

What does "t" represent in both of the formulas to calculate exponential growth and decay?

f(t) = a (1 - r)^t

f(t) = a (1 + r)^t

• Three

• Time

• Two

• Total

Which of the following words show growth? SELECT ALL THAT APPLY.

• Decrease

• Increase

• Depreciate

• Decays

• Grows

Which of the following words show decay? SELECT ALL THAT APPLY.

• Increase

• Decrease

• Grows

• Decays

• Depreciates

What does "a" represent in both of the formulas to calculate exponential growth and decay?

f(t) = a (1 - r)^t

f(t) = a (1 + r)^t

• Always

• Absolute Value

• Asymptote

• Initial Amount

Is this exponential growth or decay?

• Growth
• Decay

Is this exponential growth or decay?

• Growth
• Decay

David invests $10,000 in a savings account that pays 3.5% annual interest. If David

makes no withdrawals or deposits to the account, how much will be in the

account after 7 years?

• $11,279.54

• $11,750.29

• $12,722.79

• $12,671.94

Classify the model as Exponential GROWTH or DECAY.
A=1200(.85)⁶

• Growth
• Decay

A 78 gram sample of Uranium loses half of its mass each year.  What is the exponential equation? 

• y=78(0.5)^x
• y=78(1.5)^x
• y=78(2)^x