Use the exponential decay model for carbon-14, A = Age 0.000121 to solve Exercises 19–20. 19. Prehistoric cave paintings were discovered in a cave in France. The paint contained 15% of the original carbon-14. Estimate the age of the paintings. 20. Skeletons were found at a construction site in San Francisco in 1989. The skeletons contained 88% of the expected amount of carbon-14 found in a living person. In 1989, how old were the skeletons?
Use the exponential decay model for carbon-14, A = Age 0.000121 to solve Exercises 19–20. 19. Prehistoric cave paintings were discovered in a cave in France. The paint contained 15% of the original carbon-14. Estimate the age of the paintings. 20. Skeletons were found at a construction site in San Francisco in 1989. The skeletons contained 88% of the expected amount of carbon-14 found in a living person. In 1989, how old were the skeletons?
Chapter5: Exponential And Logarithmic Functions
Section5.5: Exponential And Logarithmic Models
Problem 30E: The table shows the mid-year populations (in millions) of five countries in 2015 and the projected...
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Transcribed Image Text:Use the exponential decay model for carbon-14, A = Age 0.000121
to solve Exercises 19–20.
19. Prehistoric cave paintings were discovered in a cave in France.
The paint contained 15% of the original carbon-14. Estimate
the age of the paintings.
20. Skeletons were found at a construction site in San Francisco
in 1989. The skeletons contained 88% of the expected amount
of carbon-14 found in a living person. In 1989, how old were
the skeletons?
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