Carbon Dating Determines the Approximate Age of an Object Made $A = - \frac { \ln P } { 0.000121 }$

question 84

Multiple Choice

Carbon dating determines the approximate age of an object made from materials that wereonce alive by measuring the remaining percentage of a radioactive isotope, carbon-14. The age is calculated Using the formula $A = - \frac { \ln P } { 0.000121 }$ where P is the percentage of remaining carbon-14 (in decimal form) . The Shroud of Turin was Found to have 92.5% of its carbon-14 remaining in the 1980's. How old was it at the time? Round To the nearest year.

• A) About 1976 years
• B) About 300 years
• C) About 644 years
• D) About 1105 years

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