33. The half-life of radium-226 is approximately 1,600 years. Step 1. Determine a so that A(t) = A,a² describes the amount of radium-226 left aft t years, where Ao is the amount at time t = 0. Round to six decimal places. Step 2. How much of a 6 gram sample of radium-226 would remain after 611 years? Round to three decimal places.

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