Chapter 6 Review

Tell whether the function represents exponential growth or decay. $$y=\left(1.6\right)^x$$

The value of a rare coin $$y$$ (in dollars) can be approximated by the model: $$y=0.25\left(1.06\right)^t$$ , where $$t$$ is the number of years since the coin was minted. Tell whether the model represents exponential growth or decay:

The value of a rare coin $$y$$ (in dollars) can be approximated by the model: $$y=0.25\left(1.06\right)^t$$ , where $$t$$ is the number of years since the coin was minted. Identify the annual percent increase or decrease in the value of the coin.

The value of a rare coin $$y$$ (in dollars) can be approximated by the model: $$y=0.25\left(1.06\right)^t$$ , where $$t$$ is the number of years since the coin was minted. What was the original value of the coin?

$$e^{-3}\cdot e^8=$$

Tell whether function represents exponential growth or decay: $$y=e^{-x}$$ . Where does the function cross the $$y$$ axis?

Simplify: $$\left(2e^{3x}\right)^3$$

Complete problem #14 on p. 353. Do steps a) and b) then fill in the blank below for part c): Estimate the percentage of surface light available at a depth of 40 meters: (a)   %

The value of a snowmobile $$y$$ , in dollars, after $$t$$ years is given by the model: $$y=4200\left(0.90\right)^t$$ . Write the value of the snowmobile after 4 years (round the nearest cent): $ (a)  

#4 on p. 353 (hint - plot f(x) in your calculator and compare)