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A. Assume that W() denotes the amount of radioactive material in a substance at time f. Radioactive decay is then described by the differential equation: dw = -AW (/) with W(0) =W. where A is a positive constant called the decay constant. 1) Give the solution to dw = -AW(1) with W(0) =W. dt 2) Assume that W(0) = 123 g and W(5) = 20 g and that time is measured in minutes. Find the decay constant 1