The ratio of 14 c and 12 c is 1. 30x10-12. Calculate the activity of the 14 c in 1. 00 g of 12 c found in living tissue.

Afish fossil is found in a rock. a foot bone and tooth are found in an older layer of the same rock. what can scientists learn from the rock? a) the area changed from land to water. b) the area changed from water to land. c) the area has always been land. d) the area was once an ocean.