Worth 50 points !
the numbers up and down there are both 10 degrees.

40+10=50

180-50=130

10+20=30

180-30=15

angle at center add up to 360

360-(130+150)=80°

The triangle is an equilateral.

180-80=100

both base angles are 50°

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)

i’ll just s take the points thxs