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If, as a result of a change in demand in a perfectly competitive increasing-cost industry, price and quantity rise, demand must have risen
Absolute Dating
A method of determining the age of an object or material, often by measuring the decay of radioisotopes.
Radioisotopes
Isotopes of elements that are radioactive, undergoing decay and emitting radiation in the process.
Fossil
Any past evidence of an organism that has been preserved in the Earth’s crust.
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