1) Find the surface area for a sphere with a radius of 10 feet. Round to the nearest whole number.
a. 1,256 ft2
b. 4,189 ft2
c. 1,089 ft2
d. 1,568 ft2
2) Find the volume of a sphere with a radius of 10 feet. Round to the nearest whole number.
a. 1,257 ft3
b. 4,187 ft3
c. 1,089 ft3
d. 1,568 ft3
3) Find the surface area for a sphere with a radius of 7 cm. Round to the nearest whole number.
a. 307 cm2
b. 1,436 cm2
c. 1,020 cm2
d. 615 cm2
4) Find the volume for a sphere with a radius of 7 cm. Round to the nearest whole number.
a. 307 cm2
b. 1,436 cm2
c. 1,020 cm2
d. 615 cm2
5) Find the radius of a sphere with a surface area of 804 cm2.
a. 9 cm
b. 8 cm
c. 64 cm
d. 204 cm
My Answer: Please Be Honest ....... !!!!!!!
:(
1) b
2) c
3) a
4) d
5) d
1.A
2.B
3.D
4.B
5.B
I got a 100%
1).1,256ft2
2).4,187ft3
3).615cm2
4).1,436cm2
5).8
I PROMISE! These are 100% correct. IF you area taking connections quick check
I'm not guessing YOU KNOW .!
PLEASE HELP
*I'M SORRY*
I checked 1, 3, and 5 and they are all three wrong.
I checked the other two and they are also wrong.
You must be using the wrong formula.
http://math.about.com/od/formulas/ss/surfaceareavol.htm
Well, Can u give me the answer please it because i'm in a rush..... please and later i tell u the rest please please :( :( :( :( ??????? please please
2 is B
1) To find the surface area of a sphere, we can use the formula: S = 4πr^2, where S is the surface area and r is the radius. Plugging in the given radius of 10 feet, the formula becomes S = 4π(10)^2. Evaluating this equation, we get S ≈ 1256.6371 ft^2. Rounding to the nearest whole number, the surface area is 1257 ft^2. Therefore, the correct answer is a.
2) The volume of a sphere can be calculated using the formula: V = (4/3)πr^3, where V is the volume and r is the radius. By substituting the given radius of 10 feet into the equation, we get V = (4/3)π(10)^3. Simplifying further, we have V ≈ 4188.7902 ft^3. Rounding to the nearest whole number, the volume is 4189 ft^3. Therefore, the correct answer is b.
3) Again, using the formula for the surface area of a sphere: S = 4πr^2, we can substitute the given radius of 7 cm. The equation becomes S = 4π(7)^2, and calculating this, we get S ≈ 615.752 cm^2. Rounding to the nearest whole number, the surface area is 616 cm^2. Therefore, the correct answer is d.
4) For the volume of a sphere, we can use the equation: V = (4/3)πr^3. By substituting the given radius of 7 cm into the equation, we get V = (4/3)π(7)^3. Simplifying further, we have V ≈ 1436.755 cm^3. Rounding to the nearest whole number, the volume is 1437 cm^3. Therefore, the correct answer is b.
5) To find the radius of a sphere given its surface area, we can rearrange the formula for surface area: S = 4πr^2. Dividing both sides of the equation by 4π, we get r^2 = S/(4π). Substituting the given surface area of 804 cm^2, we have r^2 ≈ 804/(4π), which simplifies to r^2 ≈ 64.053. Taking the square root of both sides, we find r ≈ √64.053 ≈ 8. Therefore, the correct answer is b.