b 1: 45 am
step-by-step explanation:
its that because if it was in the pm it would be 1345
c 1 hour
m = 2e
m = 2 so 2 = 2e
1 = e
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)