The disagreement over water usage has led some Central Asian countries to? a. use water only on weekends b. come up with alternatives to water use (dams/hydroelectricity)

c. come up with agreements

d. conflict and water theft

the answer is "c" im pretty sure.

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