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Sputnik I, the first artificial satellite to circle the planet (October 1957) had a mean orbital radius of 6951 km. Compute its period.? What is the universe? Can someone explain to me users rating math? If you divide the number of males in the United States by the number of people who are neither male nor female, what number do you get? Find the limit using l'Hopital's rule. lim (x->0) (1/sinx)-(1/radicalx)?