D. √145
ExplanationStep 1: For vector magnitude, add the squares of components. Step 2: |a| = √(8^2 + 9^2) = √145. Step 3: Magnitude is the square root of the sum of squares.
Step 1: Vector की magnitude के लिए components के squares जोड़ें। Step 2: |a| = √(8^2 + 9^2) = √145। Step 3: Magnitude हमेशा square root of sum of squares होती है।
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