Question: Use the exponential decay model, A = A 0 e kt , to solve this exercise. The half-life of iodine-131 is 7.2 days. How long

Use the exponential decay model, A = A₀e^kt, to solve this exercise. The half-life of iodine-131 is 7.2 days. How long will it take for a sample of this substance to decay to 30% of its original amount? Round to one decimal place.

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