[tex]x=100000(5*sqrt(y)-1)[/tex]

[tex]x=100000(\frac{(5*sqrt(y)-1)}{(4*sqrt(y))})[/tex]

i'm having alot of trouble trying to find the lower and upper limit of the two functions. I tried setting the two functions together and solving for y, but i get 0. then trying to plug in 0 for y which gives me -100000 for the first function, but you cant plug in 0 for y for the second function.