What are the domain and the range of this function? •< •≤ •-5 •-4 •1 •7

D: ?, ? | X: ?, ?

R: ?, ? | Y: ?, ?

Layer r contains a well-known index fossil that is 100 million years old. based on this information and the principle of superposition, a. layers t and m are older than 100 million years, and layers x and g are younger than 100 million years. b. layers t, m, x, and g are all older than 100 million years. c. layers t and m are younger than 100 million years, and layers x and g are older than 100 million years.