The drug valium is eliminated from the bloodstream exponentially with a half-life of 36 hours. suppose that a patient receives an initial dose of 75 milligrams of valium at midnight.  a. how much valium is in the patient's blood at noon the next day? b. estimate when the valium concentration will reach 35% of its initial level.  step by step

Abottled water distributor wants to estimate the amount of water contained in 1-gallon bottles purchased from a nationally known water bottling company. the water bottling company’s specifications state that the standard deviation of the amount of water is equal to 0.02 gallon. a random sample of 50 bottles is selected, and the sample mean amount of water per 1-gallon bottle is 0.995 gallon a. construct a 99% confidence interval estimate for the popula-tion mean amount of water included in a 1-gallon bottle. b. on the basis of these results, do you think that the distributor has a right to complain to the water bottling company? why? c. must you assume that the population amount of water per bottle is normally distributed here? explain. d. construct a 95% confidence interval estimate. how does this change your answer to (b)?