The LD50 for caffeine is 192mg/kg. How many cups of caffeine would provide a lethal dose for a 150lb person? (1cup contains 92mg of caffeine and 2.21 lb=1kg)

Why is it important for scientists to review and repeat the work of other scientists? 1.a scientific theory must be tested three times before it is proven. 2.the scientific method only applies to repeated experiments. 3.an experiment may have had errors that the scientists didn't recognize. 4.the results of individual scientists may be influenced by bias. 5.an experiment must be performed twice before the data can be analyzed.