➷ As you can see, to get from the first value to the second value, we multiply by -4. This also applies for going from the second value to the third. This is the pattern.
Area of the figure: Af = a² + 2 a²/4 π = 2.57 a² Area of the shaded region: As = 2 a²/4 π = 1.57 a² x = (1.57 · 100) / 2.57 = 61 % ≈ 60 % Answer: B) about 60 %
