Weegy: 11,460 years is a mammoth’s tusk if 25 percent of the original C-14 remains in the sample. The half-life of C-14 is 5730 years.
Solution:
Amount remaining=
original amount/ 2^n
100/25 = 2^n
4=2^n
n=2
t=nt 1/2 = 2 x 5730 yrs = 11,460 years
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