Using the functions N(x) and S(x) (and using ® to convert to miles)we find the perimeter of the United States to be 8,878 miles: the U.S.- Canadian border is 3,283 miles, the U.S.-Mexican border is 1,386 miles, and the lengths of the Atlantic, Gulf, and Pacific coasts are 1,719, 1,315, and 1,175 miles respectively. According to the 1963 Boundary Agreement, the length of the U.S.- Mexican border is 1,933 miles. By the U.S. Geological Survey the length of the U.S.-Canadian border (excluding the Alaskan border) is 3,987 miles [3]. The lengths of the jagged coasts are more difficult to compute...