Question 1014926
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y varies directly as the square of x and inversely as the square root of z. if x is quadrupled and z is multiplied by 8, How much will y change?
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<U>Answer</U>.   {{{Y[new]/Y[old]}}} = {{{(4^2)/sqrt(8)}}} = {{{16/(2*sqrt(2))}}} = {{{8/sqrt(2)}}} = {{{(8*sqrt(2))/2}}} = {{{4*sqrt(2)}}}.
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