The proportional relationship between the number of hours a business operates and its total cost of electricity is shown in the following graph. Which statements about the graph are true? Choose all answers that apply: A The y-coordinate of point A represents the total cost of electricity when the business operates for 4 hours. B The total cost of electricity is $35 when operating the business for 1 hour. C None of the above

goog may have it for you

stethere all not eveanp-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