Superposition is used to assign relative ages to rock layers, the newer layers on the bottom and the oldest layers on the top

False.

Explanation:

The Law of Superpostion is used to date rock layers, also knowns are  strata.  Rocky bodies which are composed by strata are very similar to onions, that is to say, they are made by superposing layers and layers of rock during the pass of thousands and millions of years. The oldest layers are on the bottom and are the base the rocky body while the newer layers are on the top of the strata. Attached you will see a Strata from Argentina.

the answer for 3 is b and the answer for 4 is d

254.34

step-by-step explanation:

the formula for area of a circle is given by

a = pi * r^2

a = pi * 9^2

a = 81*pi

using 3.14 as an approximation for pi

a = 3.14*81

a = 254.34