What are some numbers that have an absolute value greater than 2 1/2

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.