//ccc.open.suny.edu/bbcswebdav/pid-1097453-dt-content-rid-6822626_1/courses/202270-GEOL-110-701/2
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4+
14. If a radiometric element has a half-life of 425 years, how old would a rock be
that only had 3.125% of the parent isotope remaining?
c. 2550 years
a. 2125 years
b. 1700 years
120%
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d. 3400 years