(Solved): The half-life of radium-223 is approximately 11.43 days. Step 1 of 3: Determine a so that A(t) = A ...

The half-life of radium-223 is approximately 11.43 days. Step 1 of 3: Determine a so that A(t) = Aoa' describes the amount of radium-223 left after t days, where Ao is the amount at time t = Answer How to enter your answer (opens in new window) a = 0. Round to six decimal places. Keypad Keyboard Shortcuts