In the figure above, triangle ACE is similar to triangle BCD. The height of ACE corresponding to the base AE is 7, and the height of BCD corresponding to the base BD is k. The area of BCD is equal to the area of trapezoid ABDE.

Quantity A:k
Quantity B:5

https://drive.google.com/file/d/1Yt-mZk0F7P6SmCQSbnjN-7qIBb3VXBZg/view?usp=drive_link