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What speed should a satellite of mass 2500 kg at 7.5 x 10^9 kn above the...

What speed should a satellite of mass 2500 kg at 7.5 x 10^9 kn above the center of the Sun, of mass 1.99 x 10 ^30 kg be traveling at in order to stay in orbit? (in m/s, G= 6.67x 10^-11 N (m/kg)^2)  

a) 2.4 x 10 ^7 m/s

b) 1.6 x 10 ^2 m/s

c) 9.3 x 10^6 m/s

d) 8.3 x 10^ 4 m/s

e) 1.3 x 10^ 5 m/s

The answer I am getting is 4206.87 m/s

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