Domain: (-infinity, +infinity) Range: [0, +infinity)
ANSWER

EXPLANATION
The given function is:

and



To find g(f(-1)), we substitute x=-1, to obtain;

We simplify the square in the denominator to get,

We now add the denominator to obtain;

4q=52
divide by 4 for both sides
4q/4= 52/4
q= 13
Answer : q=13
Zinc = 7/18
Divide 4.9 by 7 = 0.7
Multiply by 18 = 12.6
The answer is 12.6 lbs of alloy. Sorry if I'm wrong