0 Points: 0 of 1 Save A scientist puts 50 grams of radioactive radium having a half~life of 1690 years into a concrete vault- What Will be the average amount of radium in the vault during the next 1400 years? "-__.~ = There will be an average of D grams of radium in the vault during the next :_ I 1400 years; " (Round intermediate steps to eight decimal places, then round the nal answer to two decimal places.)