Find the area of the shaded regions.

About 21.98 cm²

Step-by-step explanation:

First, find the area of the large shaded circle:

Find the area of the two small unshaded circles:

Subtract the area of the small circle from the large circle:

Therefore, the area of the shaded region is:

both equations and proportions are better.

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