Exponentials Review

Is this an example of growth or decay? What is the rate of growth or decay? $$f\left(x\right)=\ 25\left(0.20\right)^x$$  

Is this an example of growth or decay? What is the rate of growth or decay? $$f\left(x\right)=\ 0.25\left(1.3\right)^x$$  

Is this an example of growth or decay? $$f\left(x\right)=90\left(\frac{1}{2}\right)^x$$  

This is an example of: $$f\left(x\right)=3\left(\frac{5}{2}\right)^x$$  

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? 

Anne currently brings in an annual salary of $46,000 and anticipates a raise of 5% every year.

Is this problem describing exponential growth or decay?

Anne currently brings in an annual salary of $46,000 and anticipates a raise of 5% every year.

Convert the rate to a decimal.

(a)  

A car bought for $13,000 depreciates at 12% annually.

Is this problem describing exponential growth or decay?

A car bought for $13,000 depreciates at 12% annually.

Convert the rate to a decimal.

(a)  

 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?