8. Choose the correct answer below. A. About \( 52,900 \mathrm{~cm}^{2} \) B. About \( 166,106 \mathrm{~cm}^{2} \) C. About \( 41,526.5 \mathrm{~cm}^{2} \) D. About \( 664,424 \mathrm{~cm}^{2} \) 9. The area of the sphere which is tinted red is about (Type an integer or a decimal.)
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Bonus Knowledge
The surface area of a sphere can be calculated using the formula \( A = 4\pi r^2 \). To find the tinted area, you'll need the radius of the sphere. Once you have that, plug it into the formula, multiply by \( 4\pi \) (approximately \( 12.57 \)), and you'll get the total surface area. Depending on your sphere's radius, the result should guide you to the corresponding answer choice above. When working with problems involving spheres, a common mistake is miscalculating the radius or confusing surface area with volume. Remember to carefully read the problem and ensure you're using the correct formula. It’s always a good idea to double-check your calculations!