(Refer to picture for diagram.)
Area of base

Area of one side

Cost of base material

Cost of material for a side

There are 4 sides so

Total cost
Your final answer would be 73, because you would have to plug in 5 for Y.
Do this by converting to vertex form
y = 4x^2 + 16x - 2
y = 4 (x^2 + 4x - 0.5) completing the square on x^2 + 4x:-
y = 4[(x + 2)^2 - 4.5]
the axis of symmetry is x = -2
So 1 = 125 miles. say there is 3 inches that would be 375. So you just multiply the 125 by how many inches there are! hope this helps! ^-^
Answer:
So, here is the answer, mate.☺️
Hope it helps.