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If you mean 4*pi*r^2 then it is the formula for finding the surface area of a sphere

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8y ago

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What is the volume of a sphere with a radius of 3.1?

The formula to calculate the volume of a sphere is V = (4/3)πr^3, where r is the radius of the sphere. Given a radius of 3.1, we substitute this value into the formula: V = (4/3)π(3.1)^3. Calculating this gives us V ≈ 127.6 cubic units.


Which expression gives the surface area oh a sphere with radius r?

The surface area ( A ) of a sphere with radius ( r ) is given by the expression ( A = 4\pi r^2 ). This formula calculates the total area that covers the surface of the sphere. The constant ( \pi ) (pi) is approximately 3.14159, and it represents the ratio of the circumference of a circle to its diameter.


What is the radius of a circle with an area of 32.1 square feet?

To find the radius of a circle given its area, you can use the formula for the area of a circle, A = πr². Rearranging this formula to solve for the radius gives r = √(A/π). Substituting the given area (32.1 square feet) into the formula, the radius is r ≈ √(32.1/π) ≈ 3.19 feet.


What is the volume of a 13cm sphere?

The volume ( V ) of a sphere can be calculated using the formula ( V = \frac{4}{3} \pi r^3 ), where ( r ) is the radius. For a sphere with a diameter of 13 cm, the radius is 6.5 cm. Plugging this into the formula gives ( V \approx \frac{4}{3} \pi (6.5)^3 \approx 1,099.56 ) cm³. Therefore, the volume of the sphere is approximately 1,099.56 cm³.


Which formula gives the volume of a sphere with radius 5?

Volume = 4/3*pi*53 = 523.599 cubic units rounded to 3 decimal places


What is the volume of a sphere with a diameter of 12 ft?

The volume ( V ) of a sphere can be calculated using the formula ( V = \frac{4}{3} \pi r^3 ), where ( r ) is the radius. Given a diameter of 12 ft, the radius is 6 ft. Plugging this into the formula gives ( V = \frac{4}{3} \pi (6)^3 = \frac{4}{3} \pi (216) = 288 \pi ) cubic feet. Therefore, the volume of the sphere is approximately 904.32 cubic feet when calculated using ( \pi \approx 3.14 ).


What expression gives the surface area of a sphere with the radius r?

Surface area of a sphere: 4*pi*r^2


What is the surface area of a sphere with diameter 18 CM?

Oh, dude, you just need to find the radius first, which is half of the diameter, so that's 9 cm. Then you use the formula for the surface area of a sphere, which is 4πr^2. Plug in 9 for r, square it, multiply by 4, and then multiply by π. That gives you a surface area of 1017π square cm, or about 3190 square cm. Easy peasy!


What is the radius of a circle with a circumference of 1000m?

The radius of a circle with a circumference of 1000m is approximately 159.15 meters. This can be found using the formula C = 2πr, where C is the circumference and r is the radius. Rearranging the formula to solve for r gives r = C / (2π). Substituting the given circumference into the formula will give you the radius.


Which expresion gives the volume of a sphere with radius 7?

4/3 pie(7exponent3)


What expression gives the volume of a sphere with radius 15?

The volume ( V ) of a sphere can be calculated using the formula ( V = \frac{4}{3} \pi r^3 ), where ( r ) is the radius. For a sphere with a radius of 15, the expression for its volume would be ( V = \frac{4}{3} \pi (15)^3 ). This simplifies to ( V = \frac{4}{3} \pi (3375) ), or ( V = 4500 \pi ) cubic units.


What is the radius of a circle with a circumference of 295 cm?

To find the radius of a circle given its circumference, you can use the formula ( C = 2\pi r ), where ( C ) is the circumference and ( r ) is the radius. Rearranging the formula to solve for the radius gives ( r = \frac{C}{2\pi} ). Substituting the given circumference of 295 cm, the radius is ( r = \frac{295}{2\pi} ) which is approximately 46.95 cm.