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dsp73
3 years ago
9

What is the surface area of a sphere with a diameter of 16 cm?

Mathematics
2 answers:
alexira [117]3 years ago
4 0
C is the correct answer
daser333 [38]3 years ago
4 0

Answer:

The correct option is C. The surface area of a sphere is 256π cm².

Step-by-step explanation:

Given information: The diameter of the circle is 16 cm.

r=\frac{d}{2}=\frac{16}{2}=8

Radius of the circle is 8 cm.

Surface area of a sphere is

A=4\pi r^2

Where, r is radius.

A=4\pi (8)^2

A=4\pi (64)

A=256\pi

The surface area of a sphere is 256π cm². Therefore the correct option is C.

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Answer:

x = 6/5 or x = -2

Step-by-step explanation:

We need to solve:

|5x+2|=8

We know that |u|=a the u = a and u = -a

Now solving:

|5x+2|=8

5x +2 = 8 or 5x +2 = -8

5x = 8-2 or 5x = -8-2

5x = 6 or 5x = -10

x = 6/5 or x = -10/5

x = 6/5 or x = -2

So, x = 6/5 or x = -2

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Step-by-step explanation:

In point a:

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