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Can someone help provide the steps?

Can someone help provide the steps?-example-1
User Omerts
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1 Answer

4 votes

9514 1404 393

Answer:

r = 2

Explanation:

"A varies inversely with r cubed" means the relation is of the form ...

A = k/r³

We can find the value of k as ...

k = Ar³ = 72·5³ = 9000 . . . . . . . multiply the above relation by r³

And we can solve this for r to get ...

r³ = 9000/A . . . . . . divide by A

r = ∛(9000/A) . . . . . take the cube root

So, for A = 1125, we have ...

r = ∛(9000/1125) = ∛8

r = 2

User DarkVision
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