Exponential Growth and Decay Practice

If the decay rate is 20%, which of the following represent the decay factor?

If the growth rate is 80%, what is the growth factor?

 A flea medicine breaks down at a rate of 20% per hour.  This is the rate of decay of the medicine. The initial dose is 60 milligrams. Which of the following represent the equation the models the amount of flea medicine left in an animal?

Penicillin decays exponentially in the human body. Suppose you receive a 300-milligram dose of penicillin to combat strep throat. About 180 milligrams will remain active in your body after 1 day. Which equation represents the amount of penicillin remaining in your body?

Which value represents the y-intercept?  $$f\left(x\right)=\frac{1}{2}\cdot3^x$$  

What is shown in this graph?

Which value represents the starting value? $$y=3\cdot\frac{1}{2}^x$$

This function represents the number of ants in a colony $$f\left(x\right)=3\ \left(\ 2\right)^x$$ How many ants did you begin with? 

This function represents the number of ants in a colony $$f\left(x\right)=3\ \left(\ 2\right)^x$$ What is the growth rate?

Jack invest $600 earning 5% interest rate. How much will he have after 5 years?