American airlines spent over 6,651,297,000 on the direct maintenance of its planes. how would this number be written in verbal form? what would the cost of maintenance be if it were rounded all the way? if american rounded its maintenance cost to the nearest hundred million, what would it be?

maybe showing the graph would

step-by-step explanation:

-387129 iq

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