Answer:
X<12 first choice.
Step-by-step explanation:
5(x+5) <85
5x +25 < 85
5x <60
X<12
Hope this helps..

Differentiate both sides, treating
as a function of
. Let's take it one term at a time.
Power, product and chain rules:



Product and chain rules:




Product and chain rules:




The derivative of 0 is, of course, 0. So we have, upon differentiating everything,

Isolate the derivative, and solve for it:


(See comment below; all the 6s should be 2s)
We can simplify this a bit by multiplying the numerator and denominator by
to get rid of that fraction in the denominator.

Answer:
402.12 + 804.24 = 1206.36