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A sample of P-33 has an activity of 0.200 Curies. How long will it take for the activity of the sample to drop to 0.0354 Curies? 152x-378y=-74,-378x+152y= -604? If 2x^2+6>7x,prove that |4x-7|>1? The is given below? What is the difference in PE between a 82.5 kg adult on a 1.25 m wall, and a 14.7 kg child on the same wall?. Answer=J?