1. (10 pts) cost in dollars is c=0.001x^2 +1.2x +40 and revenue in dollars is r-5x where x represents units and assume that x21. find the (x, y) coordinates of the maximum of the average profit function. graph the average profit function for 1 s x s1000 units and indicate the coordinates of its maximum value.

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step-by-step explanation:

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step-by-step explanation:

3x + 4y -25 =0 represents the amount of change sianna should recieve

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