Can somebody me with 10 probability #?

Given f(x) = x − 7 and g(x) = x2 . find g(f( g(f(4))

There is diarrhea on the floor. what do i do? my mum gonna see that i diarrhea on the floor! * don't report, i'm serious! *

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.