1. Dinosaur fossils are too old to be reliably dated using carbon-14, which has a half-life...
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1. Dinosaur fossils are too old to be reliably dated usingcarbon-14, which has a half-life of about 5730 years. Suppose wehad a 68 million year old dinosaur fossil. How much of the livingdinosaur's 14C would be remaining today? (Round youranswer to five decimal places.)
______ %
Suppose the minimum detectable amount is 0.3%. What is the maximumage of a fossil that we could date using 14C? (Roundyour answer to the nearest integer.)
______ yr
2. A roast turkey is taken from an oven when its temperature hasreached 185°F and is placed on a table in a room where thetemperature is 75°F. (Round your answers to the nearest wholenumber.)
(a) If the temperature of the turkey is 150°F after half anhour, what is the temperature after 60 minutes?
T(60) = ____ °F
(b) When will the turkey have cooled to 100°?
t = _____ min
3. Use the Laws of Logarithms to combine the expression.
ln(10) + 3 ln(x) + 3 ln(x2 + 10)
________
1. Dinosaur fossils are too old to be reliably dated usingcarbon-14, which has a half-life of about 5730 years. Suppose wehad a 68 million year old dinosaur fossil. How much of the livingdinosaur's 14C would be remaining today? (Round youranswer to five decimal places.)
______ %
Suppose the minimum detectable amount is 0.3%. What is the maximumage of a fossil that we could date using 14C? (Roundyour answer to the nearest integer.)
______ yr
2. A roast turkey is taken from an oven when its temperature hasreached 185°F and is placed on a table in a room where thetemperature is 75°F. (Round your answers to the nearest wholenumber.)
(a) If the temperature of the turkey is 150°F after half anhour, what is the temperature after 60 minutes?
T(60) = ____ °F
(b) When will the turkey have cooled to 100°?
t = _____ min
3. Use the Laws of Logarithms to combine the expression.
ln(10) + 3 ln(x) + 3 ln(x2 + 10)
________
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