(a + b) (a-b ) - 4b - 4
<u>Explanation:</u>
Given:
a² - b² - 4b - 4
(a + b) (a-b ) - 4b - 4
This equation cannot be solved further.
Thus, the equation is (a + b) (a-b ) - 4b - 4
Ratio of men to women: 21:28, also simplified as 3:4
Ratio of women to the total number of people: 28:49 which is also 4:7
Answer:

Step-by-step explanation:
Imagine that the point E is variable along the ED line.
As you lower E along ED, the angle EDG gets smaller and smaller, so this is the angle of depression.