Subjects geometry

Sphere Volume F44165

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Question: Find the volume of the sphere. Either enter an exact answer in terms of $\pi$, or use 3.14 for $\pi$ and round your final answer to the nearest hundredth if applicable.
1. **State the problem:** We need to find the volume of a sphere with radius $r = \frac{1}{2}$. 2. **Formula for the volume of a sphere:** $$V = \frac{4}{3} \pi r^3$$ This formula calculates the volume based on the radius $r$. 3. **Substitute the radius:** $$V = \frac{4}{3} \pi \left(\frac{1}{2}\right)^3$$ 4. **Calculate the cube of the radius:** $$\left(\frac{1}{2}\right)^3 = \frac{1^3}{2^3} = \frac{1}{8}$$ 5. **Substitute back:** $$V = \frac{4}{3} \pi \times \frac{1}{8}$$ 6. **Simplify the fraction:** $$V = \frac{4}{3} \times \frac{1}{8} \pi = \frac{4 \times 1}{3 \times 8} \pi = \frac{4}{24} \pi$$ 7. **Simplify the fraction $\frac{4}{24}$:** $$\frac{4}{24} = \frac{\cancel{4}^1}{\cancel{24}^6} = \frac{1}{6}$$ 8. **Final exact volume:** $$V = \frac{1}{6} \pi$$ 9. **Approximate using $\pi \approx 3.14$:** $$V \approx \frac{1}{6} \times 3.14 = 0.5233...$$ 10. **Round to nearest hundredth:** $$V \approx 0.52$$ **Answer:** The volume of the sphere is exactly $$\frac{1}{6} \pi$$ or approximately $0.52$ when rounded to the nearest hundredth.
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