What was polk's plan for the conduct of the war?

Polk believed that it was the destiny of the U.S. to expand entire continent as part of its Manifest Destiny. He believed that the war with Mexico fitted well with that vision.  When the U.S. won it took over several territories from the Mexicans.

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.