SOLUTION: If s varies directly as t2, and s = 125 when t = 5, find s when t is 7.

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Question 607106: If s varies directly as t2, and s = 125 when t = 5, find s when t is 7.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Note: Labeled Your Inquiry:  Alegebra:Proportions

If s varies directly as t^2, and s = 125 when t = 5, find s when t is 7.

Let k represent the constant defining this direct porportion

 s+=+kt%5E2

 125+=+k5%5E2

 125 = k·25

   5 = k

 s+=+highlight%285%297%5E2

 s = 5·49 = 245