According to the law of superposition, which layer is the oldest? youngest?

According to the law of superposition which is the basic law of geo-chronology, in any undisturbed sequence of rocks deposited in layers, the youngest layer is on top and the oldest on bottom, each layer being younger than the one beneath it and older than the one above it.

So, the oldest layer is at the bottom and the youngest layer is at the top.

step-by-step explanation:

y=mx+b

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm