As a radiology specialist you use the radioactive substance iodine-131 to diagnose conditions of the thyroid gland. Iodine-131 decays at the rate of 8.3% per day. Your hospital currently has a 20-gram supply. Determine the number of grams of iodine-131 remaining after 2 months (60 days). Estimate your answer to 2 places after the decimal.

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)