In a survey of 3325 adults aged 57 through 85 years, it was found that 81.5% of them used at least one prescription medication. Complete parts (a) through (c) below. f ..... '\\ E a. How many of the 3325 subjects used at least one prescription medication? 2710 (Round to the nearest integer as needed.) b. Construct a 90% condence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication. |:|%