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Review for the Dual-Credit Pre-Calculus Test on Logarithmic and Exponential Functions. 1 . Evaluate the expression. 2. Evaluate the expression . 3. Simplify so that the result does not contain logarithms of products, quotients or powers.
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Review for the Dual-Credit Pre-Calculus Test on Logarithmic and Exponential Functions
3. Simplify so that the result does not contain logarithms of products, quotients or powers.
Rewrite as a single Logarithm.
7. Be sure you can match equations to graphs, as found in sections 4.1 and 4.2
Use the change of base rule to evaluate to the nearest thousandth:
13. Determine the value of an investment in the amount of $4,500 that matures in 4 years and pays 5.8% per year compounded monthly.
14. A culture of bacteria starts with 2,000 bacteria and the population doubles every three hours. When will the population reach 18,000?
15. A lighthouse foghorn emits a sound rated at watts per square centimeter. Calculate the decibels of the foghorn. Use the equation
16. A certain radioactive substance has a half-life of four years. How much of a 200-gram sample will remain after 15 years?
17. A certain alkaline solution has a hydrogen ion concentration of ions per mole of solution. Calculate the pH of this solution. Use the equation
18. The parents of a 3-year-old child put $16,000 into an account with the hope that the amount will grow to $70,000 when the child starts college in 15 years. What rate of continuously compounded interest is necessary for this goal to be met?