The area of kaitlyns square garden is 345square feet. one side of the garden as next to a shed. she wants to put a fence around the other three sides of the garden. find three sets of approximations for the amount of fence it will take. then determine how much fence she should buy.

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

but which class are u may know that first