Answer is E, need to see relativistic work for answer. Also, could you explain v

Question

Answer is E, need to see relativistic work for answer. Also, could you explain various +/- signs if you could, not understanding how I didn't get this right.

8, A spaceship traveling at 0.100 away from a stationary enemy station, shoots a projectile tow ards the station, with a speed of 0560c relative to the spaceship. What is the speed of the tow ards the station, with a speed of0560c relative to the spaceship. What is the speed of the prajectile relative to the station? A)0.660c B) 0.460c C)0.492 D)0.492c E) 0.487c

Explanation / Answer

Speed of the projectile relative to the station is
S = (v+u)/(1+vu/c²)
S=(0.66c)/(1+[(0.56x0.1)/(3x108 )2 ])

S=0.66c

Therefore answer is option A

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