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3. A 500 g sample of Uranium-238 has a half-life of 5.2 h. The amount remaining is given by the formula M(t) = 500(0.5) 5.2

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3. A 500 g sample of Uranium-238 has a half-life of 5.2 h. The amount remaining is given by the formula M(t) = 500(0.5) 5.2 . a) Find the amount of Uranium-238 remaining after 24 h? [2 Marks] b) Estimate the instantaneous rate of change in mass at 24 h. [4 Marks] ( hint: X, = 23.99 and 2(2= 24.01)

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