Chapter 7 Practice Test
Chapter 7 Practice Test Name___________________
Identify each function as modeling either exponential growth or exponential decay.
[pic] 2. [pic] 3. [pic]
Write an exponential equation to model each situation. Find the value of each function after 5 years.
4. A home worth $150,000 appreciates 1% each year.
5. A $12,500 car depreciates 9% each year.
6. A baseball card worth $50 increases 3% each year.
Use the appropriate compound interest formula to solve each equation.
7. You invest $20,000 in an account that earns 9% interest that gets compounded monthly. How much money will you have in 7 years?
8. You put $7500 into an account that gets its interest compounded continuously at a rate of 4%. How much money will you have in 5 years?
9. You invest $3,000 in account that earns its interest semi-annually at a rate of 7%. How much money will you have in 6 years?
Write each equation in logarithm form.
10. [pic] 11. [pic] 12. [pic]
Write each equation in exponential form.
13. [pic] 14. log 0.00001= -5 15. [pic]
Evaluate.
16. [pic] 17. [pic] 18. [pic] 19. [pic]
Write each logarithm expression as a single logarithm.
20. [pic] 21. [pic] 22. [pic]
Expand each logarithm expression.
23. [pic] 24. [pic] 25. [pic]
Solve each equation.
26. [pic] 27. [pic] 28. [pic]
29. [pic] 30. [pic] 31. [pic]
32. [pic] 33. [pic] 34. [pic]
35. [pic] 36. [pic] 37. [pic]
Graph the following equations.
38. [pic] 39. [pic]
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