Answer:
[tex]Distance=\sqrt{\frac{Luminosity 4\pi }{App Brightness} }[/tex]
Explanation:
The formula for apparent brightness is given by the next inequation:
[tex]B=\frac{L}{4\pi d^{2} }[/tex]
Where B equals apparent brightnes, L equals luminosity and D equals distance.
SO we just have to clear distance from the formula and are left with the inequation to calculate distance:
[tex]Distance=\sqrt{\frac{Luminosity 4\pi }{App Brightness} }[/tex]
