Need to see if these are correct

Find the commission on a $590.00 sale if the commission is 15%.

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

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?