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If \(\sqrt{x}=6.8\), which point does \(x\) represent on the number line?

Answer and explanation

Correct answer: 46.24

Given \(\sqrt{x}=6.8\), squaring both sides gives \(x=(6.8)^2=46.24\). Therefore, \(x\) represents the point 46.24 on the number line. The closest distractor, 45.24, is not the square of 6.8. Exam tip: For a decimal square, use \((a+b)^2=a^2+2ab+b^2\); here, \((6+0.8)^2=36+9.6+0.64=46.24\).

Related tags

Number LineSquare Root EquationDecimal SquarePolynomialsReal NumbersRepresenting Real Numbers On The Number LineMathematicsClass 10 Mcq

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