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Please help with volume of spheres?

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the volume of a sphere of radius 4 is just 256pi/3. you should not ever make numerical approximations like that unless you have a very good reason to do so. the volume is not 268.08 or 268.1. those are rational numbers, 256pi/3 is not.
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Correct!
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You're a bit off. What order are you doing your operations?


EDIT: I think you're probably using a higher precision of pi than them. Try just using 3.14

That's really common in auto-graders

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