Most road and racing bicycles today use 3,038.58 square centimeter rims, though 2,560.52 square centimeters rims are popular with smaller riders and triathletes. What is the difference between the diameters of the rims?

b

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

30,40,50 is correct answer