What is acrtan(5/6)? Or also know as, tan^-1(5/6)?

Aswim teacher sells lesson packages. the best deal has the highest ratio of lessons to total cost.swim lesson packagesnumber of lessons total cost$10$4010 1 $8015$80which package is the best deal? l lesson for $105 lessons for $4010 lessons for $8015 lessons for $80mark this and returnsave and exit

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that

Aubrey read 29 books and eli read 52 books what number is equal to the number of books aubrey read?