X Question 6 [0/1 pt 5 8 0 Details Score on last try: 0 of 1 pts. See Details for more. You can retry this question below The half-life of Radium-226 is 1590 years. If a sample contains 400 mg, how many mg will remain after 1000 years? 64.67 X mg Give your answer accurate to at least 2 decimal places. Question Help: Video 1 ) Video 2 Message instructor Submit Question X Question 7 0/1 pt 5 9 7 Details