The top of a sedimentary layer was deposited before the bottom.
a. true
b. false

It is a completely false statement that the top of a sedimentary layer was deposited before the bottom. The correct option among all the options that are given in the question is the second option or option "B". The top layer is always deposited later than the bottom layer. I hope the answer helps you.

Nigeria and south africa

343^x = 49^4-xx = 4-xx+x=42x = 4x = 4/2x = 2therefore x = 2