In a statistics class the average grade on the final examination was 75 with a standard deviation of 5. Please provide steps for each problem.

a) At least what percentage of the students received grades between 50 and 100?

b) Determine an interval for the grades that will be true for at least 70% of students.

Written notes can initiate action, as in restaurant orders or reports of machine malfunction, or they can serve as memory aids. True, many uses of writing are abbreviated, routine, and repet- itive, and they infrequently require interpretation or analysis. But analytic moments can be part of routine activities, and seem ingly basic reading and writing can be cognitively rich. Because workplace language is used in the flow of other activities