Tests of an artifact discovered at the Debert site in Nova Scotia show that 31% of the original  is still present. What is the probable age of the artifact?
?
(Use )
?
Please round your answer to the nearest whole.
?
__________ years old

Fill in the blank(s) with the appropriate word(s).


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Mathematics

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Name the quadrant in which the angle ? lies.cot ? < 0, cos ? > 0

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A.
B.
C.
D.

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