The value of this is -1 so the answer is B.
HOPE THIS HELPS!
HAVE A GR8 DAY;-)
The first one and the 6,7,8th one all go to the right reasoning is for the positives section
now the 2nd 3rd 4th 5th go's to the left reasoning for that is because its a negative
hope i helped ;)
Please, see the offered solution, note, there are 2 ways in it (a and b)
The value of
is 
Explanation:
Given that the function
is 
We need to determine the value of 
<u>The value of Opposite side of the triangle:</u>
The formula for
is given by

The value of opposite side can be determined using the formula,




Thus, the value of opposite side is 4
<u>The value of </u>
<u>:</u>
The formula for
is given by

Substituting the values, we have,

Thus, the value of
is 
<u>The value of </u>
<u>:</u>
The formula for
is given by

Substituting the values, we have,


Thus, the value of
is 
Hence, the value of
is
F(x) = 2w + I = 2w 5000/w
f'(x) = 2 - 5000 / w^2
Fencing is minimum, so f(x) = 0
2 - 5000/w^2 = 0
2 = 5000 /w^2
2w^2 = 5000
w = 50
I = 5000/2
= 1000
2w + I
= 200
hope this helps