Answer:

You don't technically need the ( ) around the 2n, but I included them to avoid confusion.
He has 30 gallons left
5/8 = 50/80
80-50=30
The answer to which is bigger is -5 because it is closer to zero
72 cookies per 36 minutes = 72/36
If both values are divided by 36:
2/1, or 2 cookies per (one) minute.
<span>Brainiest would be nice.</span>
Perimeter (P) = 2 · Length(L) + 2 · Width (W) → P = 2L + 2W
Solve for either L or W (I am solving for L).
200 - 2W = 2L
(200 - 2W)/2 = L
100 - W = L
Area (A) = Length (L) · Width (W)
= (100 - W) · W
= 100W - W²
Find the derivative, set it equal to 0, and solve:
dA/dW = 100 - 2W
0 = 100 - 2W
W = 50
refer to the equation above for L:
100 - W = L
100 - 50 = L
50 = L
Dimensions for the maximum Area are 50 ft x 50 ft