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15. A sphere has a radius of 4 centimeters. The formula for finding the volume of a sphere is [tex]\( V = \frac{4}{3} \pi r^3 \)[/tex].

What is its volume, to the nearest cubic centimeter?

A. [tex]\( 288 \pi \)[/tex]
B. [tex]\( \frac{256}{3} \pi \)[/tex]
C. [tex]\( 36 \pi \)[/tex]
D. [tex]\( \frac{2048}{3} \pi \)[/tex]


Sagot :

To find the volume of a sphere, we use the formula:
[tex]\[ V = \frac{4}{3} \pi r^3 \][/tex]
Given that the radius [tex]\( r \)[/tex] of the sphere is 4 centimeters, we substitute [tex]\( r = 4 \)[/tex] into the formula:

[tex]\[ V = \frac{4}{3} \pi (4)^3 \][/tex]

First, calculate [tex]\( 4^3 \)[/tex]:
[tex]\[ 4^3 = 4 \times 4 \times 4 = 64 \][/tex]

Next, substitute [tex]\( 4^3 = 64 \)[/tex] into the volume formula:
[tex]\[ V = \frac{4}{3} \pi \times 64 \][/tex]

Now, multiply [tex]\( \frac{4}{3} \)[/tex] and 64:
[tex]\[ \frac{4}{3} \times 64 = \frac{256}{3} \][/tex]

So the volume of the sphere is:
[tex]\[ V = \frac{256}{3} \pi \][/tex]

Therefore, the correct answer is:
[tex]\[ \boxed{\frac{256}{3} \pi} \][/tex]
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