Really stuck please help!

n =  b^2 - a^2/b^2 - a^2

Step-by-step explanation:

sqrt(a^2n + a^2) = sqrt(b^2n - b^2)

square both sides to get a^2n + a^2 = b^2n - b^2

a^2 + b^2 = b^2n - a^2n

divide both sides by n to get a^2 + b^2/n = b^2 - a^2

n =  b^2 - a^2/b^2 - a^2

answer: b.36 feet

step-by-step explanation:

i dont know the answer but here's a picture of a dog