Question (77/85)

Evaluate: `sqrt((25/81 - 1/9))`

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(A)  2/3

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(B)  4/9

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(C)  16/81

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(D)  25/81

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Question (78/85)

If y = 5, then what is the value of `10 y sqrt(y^3 - y^2)`

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(A)  50

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(B)  100

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(C)  200

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(D)  500

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