Which situation represents a total change in value of 0? A) You climbed 15 feet up a tree before coming back down 15 feet,
B) You climbed 3,000 feet up a mountain and then climbed down 1,000 feet to camp.

A

Step-by-step explanation:

this is because think of it as walking up the stairs, you walk up 3 steps and turn around and walk down 3 more, therefore you climb 15 feet up and climb the same amount of feet back down

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)