Keith is going to use 20 m of fencing to fence off a rectangular field to grow vegetables. he is considering three fields with lengths of 3 m, 4 m, and 5 m.
answer the questions below to find which of these fields would hold the most vegetables.

i found two solutions,   n = 2 • ± √3 = ± 3.4641

step-by-step explanation:

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204