SOLUTION: Write a general formula to describe the variation. F varies inversely with d^2, F=63 when d=9

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Question 989244: Write a general formula to describe the variation. F varies inversely with d^2,
F=63 when d=9
Answer by farohw(175) About Me  (Show Source):
You can put this solution on YOUR website!

F varies inversely with d^2, F = 63 when d = 9

Formula: F+=+k%2Fd%5E2

63+=+k%2F9%5E2 ---> 63+=+k%2F81


Multiply both sides by 81:
81%2A63+=+%28k%2F81%29%2A81 ---> 5103+=+k

The variation formula is,
F+=+5103%2Fd%5E2