Scientists found an animal skull during an excavation and tested the amount of carbon-14 left in it. they found that 55 percent of the carbon-14 in the skull remained. how many years ago was the animal buried? round your answer to nearest whole number. (hint: a = a0e-0.000124t.) a) 443,548 years b) 362,903 years c) 6,439 years d) 4,821 years