College Algebra Help PLEASE!!?

*^He@tHeR N

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Question:
The measure of the magnitude of brightness of a star is given by m6-2.5 log(L/L subscript 0. If L= Lsubscript 0/10 divided by L subscript 0/10 then what is the corresponding magnitude?


Please help.. This question is sooo hard and I dont know how to get the answer..

Multiple Choice:
A=8.5
B=3.5
C=-3.5
D=10.5

All help is appreciated! THANK SO MUCH!
 
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