Points: 0.5 of 1 Save When studying radioactive material, a nuclear engineer found that over 365 days, 1,000,000 radioactive atoms decayed to 979,366 radioactive atoms, so 20,634 atoms decayed during 365 days. a. Find the mean number of radioactive atoms that decayed in a day. b. Find the probability that on a given day, 55 radioactive atoms decayed a. The mean number of radioactive atoms that decay per day is 56.532 (Round to three decimal places as needed.) b. The probability that on a given day, 55 radioactive atoms decayed, is (Round to six decimal places as needed.)