Diameter is 22.5m. Calculate the area (round your answer to 2 decimal places), Use 3.14 for Pi​

397.61m

Step-by-step explanation:

A = 1

4πd^2 = 1

4 x π x 22.52 = 397.60782

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

i believe the answer is c.