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While a dog runs forward, its owner pulls back with a 22.4 N force at a 115°direction, -42.3 J of work. How far did the dog move? For what values of x is (x-2)(x-3)(x-4)(x-5) < 8? Help with hypothesis in the format "If, then, because" when my experiment is based on bacteria identification? As per the photon concept of light ,does a ray of light have an end in space and do different rays have different ends? Prove that x³+3x+14>0 for x>-2.?