4. Which of the following is a technique involved with reduced impact
logging?
A. Not dearing out an entire area of trees
B. Marking trees that are multing to spare them
C. Dloging drainage channels across dirt roads
D. All of the above

the answer would be the third option, "no, ariel should have added 9^2 and 12^2 and compared that to 15^2."

this is found through the pythagorean theorem, which is a^2 + b^2 = c^2.

this is the correct way of solving the problem:

9^2 + 12^2 = 15^2

81 + 144 = 225

225 = 225