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Natural Logarithms. Section 8.6. Recall that. Natural Logs. Evaluate. Using Natural Logs to solve equations. How long would it take an investment to double if it is compounded continuously at 3.25\%?. Solving Natural Log Equations. Solving Natural Log Equations.

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Presentation Transcript
slide2
Recall that

Natural Logs

slide8
Write an exponential equation then solve
  • Carbon-14 is used to study fossil remains. It has a half-life of 5760 years. What is the age of a fossil with 1/5 of its carbon-14 remaining?
  • Medical research indicates that the risk of having a car accident increases exponentially as the concentration of alcohol in the blood increases. The risk is modeled by: R= , where x is the blood alcohol concentration and R, given as a percent, is the risk of having a car accident. What blood alcohol concentration corresponds to a 17% risk of a car accident?
slide9
The exponential decay model for Carbon-14 is
  • Prehistoric cave paintings were discovered in a cave in France. The paint contained 15% of the original carbon14. Estimate the age of the paintings.
slide10
Homework

Workbook 8-6 #7-45 odd

Wkst: word problems

Page 465 #14-38

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