Answer:
f(x)=sqrt(x-5) of f(x)=(x-5)^(1/2)
Step-by-step explanation:
Plug in f(x) for x
x=f(x)^2+5
x-5=f(x)^2
f(x)=sqrt(x-5)
I believe it's 15 days
1215.916
She buys 10kg
hope this helps