Select from the drop-down menus to correctly identify whether the given operation is closed or not with respect to each set of numbers
1. Real numbers are (closed/not closed) under multiplication
2. Irrational numbers are (closed/not closed) under division
3. Integers are (closed/not closed) under subtraction
4. Positive rational numbers are (closed/not closed) under addition

Which recursive formula can be used to determine the total amount of money earned in any year based on the amount earned in the previous year? f(n+1)=f(n)+5

Tcan be concluded that % of the seniors would prefer to see more candid pictures in this year's edition of the yearbook.

Two language majors, anna and megan, took exams in two languages. anna scored 85 on both exams. megan scored 74 on the first exam and 85 on the second exam. overall, student scores on the first exam had a mean of 82 and a standard deviation of 4, and the second exam scores had a mean of 71 and a standard deviation of 13. a) to qualify for language honors, a major must maintain at least an 85 average across all language courses taken. so far, which of anna and megan qualify? b) which student's overall performance was better?