Shape and Space 8
3 marks · NormalThe vector is . Calculate the magnitude of , giving your answer to 3 significant figures.
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8.06 (±0.01)
Also accept: 8.062; 8.0622577483
Common mistakes: Leaving answer as a surd; Not rounding to 3 significant figures
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Marking points
M1 · 1 mark · Chooses correct formula:
M2 · 1 mark · Squares values and adds: 49 + 16 = 65
A1 · 1 mark · Correct answer: 8.06 to 3 significant figures
Worked solution
The magnitude is .