The bill is $330. we want to split it but a friend gave us $50 for it. therefore we each owe $140 after the $50. since i have the $50 in my possession i wok give him $165 since were splitting the $50. correct?

first one because it can't have a fraction in it

step-by-step explanation:

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)