The figure shows a highway sign that warns of a railway
crossing. The lines that form the cross pass through the circle's
center and intersect at right angles. If the radius of the circle is
20 inches, find the length of each of the four arcs formed by the
cross. Express your answer in terms of u and then round to two
decimal places

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

what is the question?

step-by-step explanation:

where's the diagram?

step-by-step explanation:

i dont know the answer but here's a picture of a dog