I need help ASAP for this question

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

What is the ratio fraction form of 25: 9

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?