The rectangle abcd is centered at the origin. c has the coordinates (w, –v). determine the length of a diagonal of abcd.
a.
2004-06-02-04-00_files/i0080001.jpg
b.
2004-06-02-04-00_files/i0080002.jpg
c.
2004-06-02-04-00_files/i0080003.jpg
d.
2004-06-02-04-00_files/i0080004.jpg

69

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