Given that <span>the average volume of water that flows over the falls each second is

gallons.
There are 3,600 seconds in one hour.
Thus, in one hour,

gallons of water </span><span>flows over the falls.
</span>Therefore, the amount of water that flows over the falls is <span>

.</span>
First, you put 93 over 100.
Then, you simplify the fraction. But it is in simplified form.
Answer is 93/100.
The notation just means
(f/g)(-4) = f(-4) / g(-4)
If f(x) = x² + 2 and g(x) = 1 - 3x, then
f(-4) = (-4)² + 2 = 16 + 2 = 18
g(-4) = 1 - 3 (-4) = 1 + 12 = 13
and so
(f/g)(-4) = 18/13
I wrote it somewhere else where I can’t copy and paste so hope this works!