I think you meant the two <em>segments</em><em> </em>are identical, if so then:

3 1/4
should be it!
Hope that helps!
Answer:
350
Step-by-step explanation:
12% = 0.12
42 / 0.12 = 350
Hey there :)
- tan²x + sec²x = 1 or 1 + tan²x = sec²x
sin²x + cos²x = 1
Divide the whole by cos²x


so

and

so

Therefore,
tan²x + 1 = sec²x
Take tan²x to the other side {You will have the same answer}
1 = - tan²x = sec²x or sec²x - tanx = 1
Each month that will give them 20$ for