Which polynomials are in standard form?
Choose all answers that apply:
Choose all answers that apply:

(Choice A)
A
5
−
2
x
5−2x5, minus, 2, x

(Choice B)
B
x
4
−
8
x
2
−
16
x
4
−8x
2
−16x, start superscript, 4, end superscript, minus, 8, x, squared, minus, 16

(Choice C)
C
5
x
3
+
4
x
4
−
3
x
+
1
5x
3
+4x
4
−3x+15, x, cubed, plus, 4, x, start superscript, 4, end superscript, minus, 3, x, plus, 1

(Choice D)
D
None of the above

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

it is x=-4

step-by-step explanation:

if you was gonna solve for a, a is a   < -12