Gregory has scored 91, 76, and 84 on the first three exams in his math class. if the standard 70,80,90 scale is used for grades of c, b, and a, and the exams are equally weighted, what is the minimum he can score on the final exam in order to: a) get a c average on exams? b) get a b average on exams? c) get an a average on exams?

Use the sample data and confidence level given below to complete parts a through d.a research institute poll asked respondents if they felt vulnerable to identity theft. in the poll, n=1090 and x=549 who said yes. use a 99% confidecne level.a. find the best point of estimate of the population of portion p.b. identify the value of the margin of error e.e= round to four decimal places as needed.c. construct the confidence interval._ < p < _ round to three decimal places.d. write a statement that correctly interprets the confidence interval.