A planet in another solar system orbits a star with a mass, Physics

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A planet in another solar system orbits a star with a mass

A planet in another solar system orbits a star with a mass of 4.0×1030 kg. At one point in its orbit it is 250×106 km from the star and is moving at 35km/s.Take the universal gravitational constant to be 6.67 × 10−11 m2/s2 · kg andcalculate the semimajor axis of the planet’s orbit. The result is:
A. 79 × 106 km
B. 160 × 106 km
C. 290 × 106 km
D. 320 × 106 km
E. 590 × 106 km

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