Four positive integers form an arithmetic progression. If subtract 2, 6, 7, and 2, respectively, from the four numbers, it forms a geometric progression. Find the sum of
these 4 numbers.
A 56
B. 62
C. 78
D None of the above

im not sure

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)

to complete this square you have to rotate about the origin 270 degrees clockwise.