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Mathematics 12 Online
melanieo9:

Find the volume of the following solid figure. Use = 3.14. V = 4/3r3. A sphere has a radius of 4.5 inches. Volume (to the nearest tenth) = cubic inches.

QuestionCoveBot:

So what you have to do is, use the formula (V = 4/3r3) Replace (r) with 4.5 Then you have 4/3(4.5)3 Multiply 4/3 and 4.5 You get 6, then you multiply 6 and 3. What is your answer melanie99?

InsatiableSuffering:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @QuestionCoveBot So what you have to do is, use the formula (V = 4/3r3) Replace (r) with 4.5 Then you have 4/3(4.5)3 Multiply 4/3 and 4.5 You get 6, then you multiply 6 and 3. What is your answer melanie99? \(\color{#0cbb34}{\text{End of Quote}}\) This is not correct, just an fyi. So the volume of a sphere is as follows: \[V=\frac{ 4 }{ 3 }πr ^{3}\] Where v is the total volume of an object, r is the radius of an object (or in this case the radius of a sphere), and pi is a constant given as 3.14. Well, you are given the radius, which happens to be the only unknown factor needed to solve this question. All it is is a plug and chug question. Replace π with 3.14 and r with 4.5 and cube the radius. Then just multiply that by the factor 4/3 to yield the volume of a sphere. What is your answer?

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