Solve the inequality and write the solution set using both set-builder notation and interval notation. -3a-15≤-2a+6

A6 ounce bottle of dressing costs $1.56 a 14 ounce bottle costs $3.36 a 20 ounce bottle costs $5.60 which has the lowest cost per ounce

Sasha delivers newspapers to subscribers that live within a 4 block radius of her house. sasha's house is located at point (0, -1). points a, b, c, d, and e represent the houses of some of the subscribers to the newspaper. to which houses does sasha deliver newspapers?

:)i need to know on which ones are corresponding, alternate interior, alternate exterior, or none of these.