about 72% of Americans are adults (20 and over). Use the U. S. population estimate of 312 million people to calculate the number of American adults age 20 and older in 2011‐2012.

Aconstruction worker needs to put a rectangular window in the side of a building he knows from measuring that the top and bottom of the window have a width of 8bfeet and the sides have a length of 15 feet he also measured one diagonal to be 17 feet what is the length of the other diagonal