How old an occupant be upon arriving at acrux

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A spaceship leaves earth and travels to star Acrux, which is located 410 ly from earth ( as measured from Earth).

A) If the spaceship travels at 0.95c, how old an occupant be upon arriving at Acrux if she was 13 years old when the ship departed from Earth

B) How far will the occupants of the spaceship say they traveled when they arrive at Acrux

C) How old will her twin sister be when she returns to Earth assuming she spent no appreciable time at Acrux?

Reference no: EM13982556

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