The half-life of cesium-137 is 30 years. Suppose we have a 37-g sample. Find a function that models the mass remaining after t years. Select the correct answer. a. m (t) = 40e - 0.02t b. m (t) - 37e - 0.024 C.m (t) - 30e - 0.023t d. m (t) - 40e - 0.03t e. m (t) = 37e 0.023

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