The half-life of carbon-14 is 5730 years. A frozen human mummy was discovered in a glacier. It was estimated that this human died 5200 years before he was discovered in the melting glacier. How much of the original carbon-14 remained in the mummy at the time of his discovery?

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Chapter5: Exponential And Logarithmic Functions
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Problem 28T: The half-life of radioactive actinium ( 227AC ) is 21.77 years. What percent of a present amount of...
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The half-life of carbon-14 is 5730 years. A frozen human mummy was discovered in a glacier. It
was estimated that this human died 5200 years before he was discovered in the melting glacier.
How much of the original carbon-14 remained in the mummy at the time of his discovery?
Transcribed Image Text:The half-life of carbon-14 is 5730 years. A frozen human mummy was discovered in a glacier. It was estimated that this human died 5200 years before he was discovered in the melting glacier. How much of the original carbon-14 remained in the mummy at the time of his discovery?
A metal beam was brought from the outside cold into a machine shop where the temperature
was held at 60°F. After 10 min, the beam warmed to 40°F and after another 10 min it was
50°F. Use Newton's Law of Cooling to estimate the beam's initial temperature.
Transcribed Image Text:A metal beam was brought from the outside cold into a machine shop where the temperature was held at 60°F. After 10 min, the beam warmed to 40°F and after another 10 min it was 50°F. Use Newton's Law of Cooling to estimate the beam's initial temperature.
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