Question

a scientist uses radioactive dating and determines a fossil is 100 million years old. what can be concluded about the rock layer in which it was found? the rock layer is also about 100 million years old. the rock layer must be at the very bottom of the ground. the rock layer is much younger than the fossil. the rock layer contains fossils of modern animals.

Explanation:

Fossils are found in rock layers. In general, the age of a fossil is approximately the same as the age of the rock layer it is in, as they form around the same time.

Answer:

The rock layer is also about 100 million years old.