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What is the volume of a hemisphere with a diameter of 
4.2cm, rounded to the nearest tenth of a cubic centimeter?
Answer: 
cm^(3)

What is the volume of a hemisphere with a diameter of 4.2 cm 4.2 \mathrm{~cm} , rounded to the nearest tenth of a cubic centimeter?\newlineAnswer: cm3 \mathrm{cm}^{3}

Full solution

Q. What is the volume of a hemisphere with a diameter of 4.2 cm 4.2 \mathrm{~cm} , rounded to the nearest tenth of a cubic centimeter?\newlineAnswer: cm3 \mathrm{cm}^{3}
  1. Find Hemisphere Radius: Find the radius of the hemisphere.\newlineThe diameter of the hemisphere is 4.2cm4.2\,\text{cm}. The radius is half of the diameter.\newlineRadius == Diameter // 22\newlineRadius == 4.2cm4.2\,\text{cm} // 22\newlineRadius == 2.1cm2.1\,\text{cm}
  2. Calculate Volume Formula: Use the formula for the volume of a sphere to find the volume of the hemisphere.\newlineThe formula for the volume of a sphere is (43)πr3(\frac{4}{3})\pi r^3. Since we want the volume of a hemisphere, we will take half of the volume of a sphere.\newlineVolume of hemisphere = (12)×(43)πr3(\frac{1}{2}) \times (\frac{4}{3})\pi r^3
  3. Substitute Radius and Calculate: Substitute the radius into the formula and calculate the volume.\newlineVolume of hemisphere = (1/2)×(4/3)π(2.1cm)3(1/2) \times (4/3)\pi(2.1 \, \text{cm})^3\newlineVolume of hemisphere = (1/2)×(4/3)π(2.1cm×2.1cm×2.1cm)(1/2) \times (4/3)\pi(2.1 \, \text{cm} \times 2.1 \, \text{cm} \times 2.1 \, \text{cm})\newlineVolume of hemisphere = (1/2)×(4/3)π(9.261cm3)(1/2) \times (4/3)\pi(9.261 \, \text{cm}^3)\newlineVolume of hemisphere = (1/2)×(4/3)×3.14159×9.261cm3(1/2) \times (4/3) \times 3.14159 \times 9.261 \, \text{cm}^3\newlineVolume of hemisphere = (1/2)×4.18879×9.261cm3(1/2) \times 4.18879 \times 9.261 \, \text{cm}^3\newlineVolume of hemisphere = 2.094395×9.261cm32.094395 \times 9.261 \, \text{cm}^3\newlineVolume of hemisphere = 19.396cm319.396 \, \text{cm}^3 (unrounded)
  4. Round Volume Result: Round the result to the nearest tenth of a cubic centimeter.\newlineVolume of hemisphere (rounded) = 19.4cm319.4\,\text{cm}^3

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