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When studying radioactive material, a nuclear engineer found that over 365 days, 1,000,000 radioactive atoms decayed to 978,917 radioactive atoms, so 21,083 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, 52 radioactive atoms deecayed a. The mean number of radioactive atoms that decay per day is (Round to three decimal places as needed.) b. The probability that on a given day, 52 radioactive atoms decayed, is (Round to six decimal places as needed.) Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of 0 and a standard deviation of 1 . Draw a graph and find the probability of a bone density test score greater than 0.64 Sketch the region. Choose the correct graph below. A. B. C. D. The probability is (Round to four decimal places as needed.) Assume that a procedure yields a binomial distribution with n=3 trials and a probability of success of p=0.60. Use a binomial probability table to find the probability that the number of successes x is exactly 2. Click on the icon to view the binomial probabilities table