1) x=9, because we can use the Pythagorean theorem, x^2 + 144 = 225, x^2 = 81
2) , because 6^2 +6^2 = 72,
3) , because
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25,700 (cost of car) + 3000 (premium package) + 700 (vehicle delivery) - 6000 (old car) = $23,400.
Law of inertia i believe sorry if im wrong:)
Thr forest
forest would probably the most, because it is already being affected a lot (deforestaion)