The phase velocity of a wave tells us how fast any given phase of the wave is moving e.g. the crest. If we examine some fixed position, then we can count how frequently a full wavelength passes this position as the wave moves with time. This leads us directly to $v = Î»f$.
Beverly Hills, Michigan, in Oakland county, is 3 miles N of Southfield, Michigan and 16 miles NW of Detroit, Michigan. The people of the town are in the Detroit metropolitan area.
Rochester Hills is bordered to the north by Oakland Charter Township, to the south by the city of Troy, to the east by Shelby Township in Macomb County, and to the west by the city of Auburn Hills. Rochester Hills is also bordered by the city of Rochester to the south, east, and west. According to the United States Census Bureau, the city has a total area of 32.91 square miles (85.24 km 2), of which 32.82 square miles (85.00 km 2) is land and 0.09 square miles (0.23 km 2) is water.