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```REVIEW 8.1 to 8.3
1. Identify the initial amount a and the growth factor b in the exponential function
2. Graph the exponential function
3. Suppose the population of a town is 2,700 and is growing 4% each year. Write an
equation to model the population growth. Predict the population after 12 years.
4. Write an exponential function
6).
for a graph that includes (1, 15) and (0,
5. Find the annual percent increase or decrease that
models.
6. For an annual rate of change of –31%, find the corresponding growth or decay
factor.
7. Use a graphing calculator. Use the graph of
decimal places.
to evaluate
8. Write the equation
in logarithmic form.
9. Write the equation
in exponential form.
to four
10. A boat costs \$15,500 and decreases in value by 10% per year. How much will the
boat be worth after 5 years?
11. The half-life of a certain radioactive material is 85 days. An initial amount of the
material has a mass of 801 kg. Write an exponential function that models the
decay of this material. Find how much radioactive material remains after 10 days.