How do I put this in roster notation?

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)

x = 12

y = 1

for the points!

step-by-step explanation:

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correct answer was 0.5