HURRY Which function is illustrated by the following graph? A function curves down through the y-axis, through the x-axis to a point, and then curves up through the x-axis to a point. a. cosine function c. Tangent function b. Sine function d. Cotangent function

the answer will be b x² +x-1

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