What exactly is your questin? You have a formula, and you should have data in your text book for values of G and M (the Earth's mass). As for the value of 'r'  it's measured from the center of the Earth, so is equal to the satellite's altitude plus the radius of the Earth. Now plug and chug  what do you get for 'v'?
By the way, please check that formula  you have a factor of 2 in there which I don't understand.
