A rectangular field is to be enclosed on 4 sides with a fence with an area of 690 ft². Fencing costs $2 per foot for 2 opposite sides and $7 per foot for the other 2 sides. The equations for this question are:
Constraint: xy = 690
Objective: Perimeter (Cost) = 14x + 4y
Find the following:
a) The dimensions that will minimize the cost. Round the dimensions to 1 decimal place. You may use the rounded dimension to find the other dimension value.
b) The minimized cost. Place a $ in your answer and round it to 2 decimal places.
we set f'=0 because when
function takes maxima or minima then at that point f'=0
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