12.175 is the correct answer
Answer:
We are given the parent function,
.
So, we have,
1. Reflection over x-axis. 2. Reflection over y-axis.
This changes f(x) to -f(x). This changes f(x) to f(-x)
New function is,
New function is 
3. Translated down by 2 units 4. Translated left by 1 unit
This changes f(x) to f(x)-2 This changes f(x) to f(x+1)
New function is,
New function is, 
5. Translated right by 2 units 6. Translated up by 1 unit
This changes f(x) to f(x-2) This changes f(x) to f(x)+1
New function is
New function is, 
Facctore each
5y^2=5*y*y
80=5*2*2*2*2
lcm of those are
5
5(y^2-16)
we can factor this difference of 2 perfect squares
5(y-4)(y+4)
y+4 is the other one
so the lcm is 5y^2-80
<em>your answer to the question would be </em><u><em>18.9 ≈ 19ft</em></u>
Well a and b both would be.