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Juliette [100K]
2 years ago
14

Find the Surface Area and Volume of Sphere with radius 12 cm.

Mathematics
2 answers:
Gnom [1K]2 years ago
8 0
Radius:r=12cm\\\\Surface\ area:\\A=4\pi r^2\to A=4\pi\cdot12^2=4\pi\cdot144=576\pi\ (cm^2)\\\\Volume:\\V=\frac{4}{3}\pi r^3\to V=\frac{4}{3}\pi\cdot12^3=\frac{4}{3}\pi\cdot1728=4\pi\cdot576=2304\pi\ (cm^3)
stepan [7]2 years ago
4 0
The surface area of a sphere is 4 pi R² = 576 pi = 1,809.6 cm² (rounded)

The volume of a sphere is 4/3 pi R³ = 2,304 pi = 7,238.2 cm³ (rounded)
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Step-by-step explanation:

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Cd has an endpoint at (2, -1) and a midpoint at (8, 3). which measure is closest to the length of cd
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Answer:

4\sqrt{13}

Step-by-step explanation:

The length of CD will be twice the distance from the midpoint to the endpoint

To calculate the length use the distance formula

d = √ (x₂ - x₁ )² + (y₂ - y₁ )²

with (x₁, y₁ ) = (2, - 1) and (x₂, y₂ ) = (8, 3)

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8 0
3 years ago
Given f(x) = 5x-5 find f(-2)​
lys-0071 [83]

Answer:

f(-2) = -15

Step-by-step explanation:

f(x) = 5x-5

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f(-2) = 5(-2) -5

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3 years ago
Need help please ASAP 50points!!! Show work
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skelet666 [1.2K]

Answer:

x=-\frac{70}{9}

Step-by-step explanation:

Isolate the variable by doing operations to both sides of the equation.  

The work is shown below:

\frac{5}{7} =\frac{10}{x} +2\\\\\frac{5}{7} - 2=\frac{10}{x} +2 - 2\\\\-\frac{9}{7} = \frac{10}{x}\\\\ -\frac{9}{7}*x = \frac{10}{x}*x\\\\ -\frac{9}{7}x = 10\\\\ -\frac{9}{7}x * (-\frac{7}{9})= 10 * (-\frac{7}{9}) \\\\x=-\frac{70}{9}

6 0
3 years ago
Read 2 more answers
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