Construct a figure A B C D with CD parallel to AB, given that AB equals to 75mm, CD 50mm BC 35mm and AC 70mm.​

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.

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)