What is the difference between 34,162 and 12,531

Is the square root of 4 plus the square root of 16 rational?

Determine the area of a triangle with (see picture below)

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?