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.
Bloomfield Hills is a city located in Metro Detroit's northern suburbs in Oakland County in the U.S. state of Michigan, 20.2 miles (32.5 km) northwest of downtown Detroit. The city is almost completely surrounded by Bloomfield Township. As of the 2010 census, the city population was 3,869.