What is the velocity of an earth satellite that is in a circular orbit with a radius of 7.5 x 10^7 meters measured from the center of the earth

The equation fo calculate the speed of a satellite is:

v = √ (G* mass of Earth / radius from the center of Earth)

G = gravitational universal constant.= 6.67 * 10 ^  -11 N * m^2 / kg^2

mass of Earth = 5.98 * 10^24 kg

radius from the center of Earth = 7.5 * 10 ^ 7 m

v = √ [ (6.67 * 10^ -11 N*m^2 / kg^2) * ( 5.98 * 10^24 kg) / (7.5 * 10^ 7 m) ]

v = √ (5.318 * 10^ 6) m^2/s^2 = 2.31 * 10^3 m/s

2.31 * 10^3 m/s

Is there any opitions? if you have the periodic table, the noble gases are 8a family, the halogen are the 7a family, and the nonmetal are  carbon, nitrogen, phosphorus, oxygen, sulfur, selenium, fluorine, chlorine, bromine, iodine and astatine.