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valentinak56 [21]
3 years ago
9

A sphere has a diameter of 11 inches. What is it's surface area? Use 3.14 to approximate pie

Mathematics
1 answer:
tamaranim1 [39]3 years ago
5 0
Sphere Surface Area<span>     <span>=     <span>π <span>• d²
</span></span></span></span><span>Sphere Surface Area<span>     <span>=     3.14 * 11*11
</span></span></span><span>Sphere Surface Area<span>     <span>=     3.14 * 121
</span></span></span><span>Sphere Surface Area<span>     =     </span></span> <span> <span> <span> 379.94  </span> </span> </span> square inches


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Whats the answer to that question?
gavmur [86]

Answer:

-0.9090... can be written as \frac{10}{11}.

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Any <em>repeating </em>decimal can be written as a fraction by dividing the section of the pattern to be repeated <em>by </em>9's.

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100x = 90 + 0 + 9/10 + 0/100 + 9/1000 + 0/10000 + 9/100000 + 0/1000000 + ...

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And we end up with this:

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x=\frac{90}{99}

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