Plsss help fast thanksss correct answer pls

Adriver from the university of florida women’s swimming and diving team is competing in the in ncaa zone b championships

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

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer