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jneal
06-16-2011, 12:05 PM
If P varies inversely as the square root of q and p=12 when q= 36. Find p when q=16

galactus
06-16-2011, 12:33 PM
P=\frac{k}{\sqrt{q}}

Sub in the given p=12 and q=36, then solve for k.

Then, after k is found, it is just a matter of subbing the q=16 into the formula.

Some general thoughts:

y varies directly or y is directly proportional to is y=kx

y varies inversely or y is inversely proportional to is y=k/x