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3 votes
How to solve for the variable which is r

How to solve for the variable which is r-example-1

2 Answers

1 vote
the x is the r because x is the variable and r is a variable
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User Nikkole
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4 votes
I think, not 100% sure, but I think it is square root (A/4pi)=r
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User Martin Reiche
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