



 
Hi Rene, I would approach the first problem this way. Since p varies inversely as the square root of q I know that
Substitute p = 12 and q = 36 to find k (k = 72) so you know that
Now substitute q = 16 and solve for p. If the question had said "a varies directly as b" I would have started with
But you have "s varies directly as r and inversely as t" so I would start with
Substitute the values you know for s, r and t to find k. I hope this helps,  


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