Which answer includes the intervals that contain the solution to the inequality? x² - 1
SO
3x + 9
O [-3, -1)/(1,0)
O (-3,-1]0[1, oh
O [-2, -30U(-1, 1)
0 (-0,-3) U[-1, 1]

(23*2)-12=x     x=34

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

i think the amount would be $140.62