Which action is an example of U. S. domestic policy? A. Congress passes a resolution condemning negotiations with Iran
B. The President signs an executive order restoring relations with Cuba
C. Congress passes a law lowering the speed limit on all interstate highways to 60 miles per hour.
D. The President orders drone attacks on ISIS camps in northern Syria

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.

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