10^(9-4+5)5 =100
100 parsecs = 326 Light years.
wowsers
**edit**
i didn't see initially that the Absolute magnitude was NEGATIVE -4 so here is the corrected answer....
10^(9-(-4)+5)/5 = 3,981.0717 Parsecs
light year = 3.2615 Parsecs
so, 3,981.0717*3.2615=12984.2653 light years.
12,984 ly
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