How old 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. A. 5730 years B. 11,460 years C. 17,190 years D. 22,920 years
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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