Which functions would create this curve

How do you write something in scientific notation?

Which of the following vectors are orthogonal to (2,1)? check all that apply

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?