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33%

Step-by-step explanation:

The area of a circle is , where r is the radius. In this case, the area of the second largest circle is (because the radius is 3 + 4 = 7) = 49.

The area of the smallest circle is = 16.

Now, the area of the shaded region is just the smallest circle's area subtracted from the second-largest circle's area:

49 - 16 = 33

To find the percentage of the logo that is shaded, we need to find the total area, which is just the area of the largest circle:

Now, we just divide 33 by 100 to get:

33/100 = 33/100 = 33%, which is our answer.

33%

Step-by-step explanation:

Total

= pi × (4+3+3)² = 100pi cm²

Shaded

= pi × ((4+3)² - 4²) = 33pi cm²

Percentage of shaded:

(33pi/100pi)×100

= 33%

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°