The xiphoid process is the smallest and most inferior region of the sternum, or breastbone. At birth, it is a thin, roughly triangular region of cartilage that slowly ossifies into a bone and fuses with the body of the sternum.
City Blocks differ in size, but the typical square city block reaches 16 or 17 per mile, or 2.21 to 2.50 Acres. Engineers use a typical city block as 100,000 sq. ft. for calculation estimates, which is about 17 blocks per mile or 2 1/4 acres. (A football field is 300 feet by 160 feet, which is 1.1 Acres.)
City blocks can range from 200 all the way to 900 feet on one side. There are 5,280 feet in a mile. So to find out how many city blocks would equal a mile, simply divide 5,280 feet by the number of feet in a block in any given city. In Tucson, Ariz., for example, blocks are 400 feet long. So 13.2 blocks would equal 1 mile.