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The square root of (272^2-128^2) is (...

The square root of `(272^2-128^2)` is (a) 144 (b) 200 (c) 240 (d) 256

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  7. sqrt((25)/(81)-1/9)=? 2/3 (b) 4/9 (c) (16)/(81) (d) (25)/(81)

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