Super easy easy question!! please explain step by step

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

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11

Eden has a part time job. she is paid ? 7.20 an hour the week she worked 18 and a half hours how much is she paid